1972961481 has 4 divisors (see below), whose sum is σ = 2630615312. Its totient is φ = 1315307652.

The previous prime is 1972961479. The next prime is 1972961483. The reversal of 1972961481 is 1841692791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1972961479) and next prime (1972961483).

It is not a de Polignac number, because 1972961481 - 2¹ = 1972961479 is a prime.

It is a super-2 number, since 2×1972961481² = 7785154011019426722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1972961481.

It is not an unprimeable number, because it can be changed into a prime (1972961483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328826911 + ... + 328826916.

It is an arithmetic number, because the mean of its divisors is an integer number (657653828).

Almost surely, 2^1972961481 is an apocalyptic number.

It is an amenable number.

1972961481 is a deficient number, since it is larger than the sum of its proper divisors (657653831).

1972961481 is an equidigital number, since it uses as much as digits as its factorization.

1972961481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657653830.

The product of its digits is 217728, while the sum is 48.

The square root of 1972961481 is about 44418.0310347048. The cubic root of 1972961481 is about 1254.2175365177.

The spelling of 1972961481 in words is "one billion, nine hundred seventy-two million, nine hundred sixty-one thousand, four hundred eighty-one".