1972297361 has 4 divisors (see below), whose sum is σ = 1975716132. Its totient is φ = 1968878592.

The previous prime is 1972297319. The next prime is 1972297373. The reversal of 1972297361 is 1637922791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1887381136 + 84916225 = 43444^2 + 9215^2 .

It is a cyclic number.

It is not a de Polignac number, because 1972297361 - 2²² = 1968103057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1972197361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1708520 + ... + 1709673.

It is an arithmetic number, because the mean of its divisors is an integer number (493929033).

Almost surely, 2^1972297361 is an apocalyptic number.

It is an amenable number.

1972297361 is a deficient number, since it is larger than the sum of its proper divisors (3418771).

1972297361 is an equidigital number, since it uses as much as digits as its factorization.

1972297361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418770.

The product of its digits is 285768, while the sum is 47.

The square root of 1972297361 is about 44410.5546126143. The cubic root of 1972297361 is about 1254.0767930320.

The spelling of 1972297361 in words is "one billion, nine hundred seventy-two million, two hundred ninety-seven thousand, three hundred sixty-one".