1972590859 has 4 divisors (see below), whose sum is σ = 1978550680. Its totient is φ = 1966631040.

The previous prime is 1972590833. The next prime is 1972590863. The reversal of 1972590859 is 9580952791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9580952791 = 547 ⋅17515453.

It is a cyclic number.

It is not a de Polignac number, because 1972590859 - 2⁵ = 1972590827 is a prime.

It is a super-2 number, since 2×1972590859² = 7782229394020715762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1972590559) 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, 2979414 + ... + 2980075.

It is an arithmetic number, because the mean of its divisors is an integer number (494637670).

Almost surely, 2^1972590859 is an apocalyptic number.

1972590859 is a deficient number, since it is larger than the sum of its proper divisors (5959821).

1972590859 is an equidigital number, since it uses as much as digits as its factorization.

1972590859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959820.

The product of its (nonzero) digits is 2041200, while the sum is 55.

The square root of 1972590859 is about 44413.8588618463. The cubic root of 1972590859 is about 1254.1389964268.

The spelling of 1972590859 in words is "one billion, nine hundred seventy-two million, five hundred ninety thousand, eight hundred fifty-nine".