1975257965 has 8 divisors (see below), whose sum is σ = 2509739640. Its totient is φ = 1487252992.

The previous prime is 1975257941. The next prime is 1975257983. The reversal of 1975257965 is 5697525791.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1107425284 + 867832681 = 33278^2 + 29459^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1975257965 - 2⁸ = 1975257709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1975257965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11619080 + ... + 11619249.

It is an arithmetic number, because the mean of its divisors is an integer number (313717455).

Almost surely, 2^1975257965 is an apocalyptic number.

It is an amenable number.

1975257965 is a deficient number, since it is larger than the sum of its proper divisors (534481675).

1975257965 is a wasteful number, since it uses less digits than its factorization.

1975257965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23238351.

The product of its digits is 5953500, while the sum is 56.

The square root of 1975257965 is about 44443.8743248156. The cubic root of 1975257965 is about 1254.7039750895.

The spelling of 1975257965 in words is "one billion, nine hundred seventy-five million, two hundred fifty-seven thousand, nine hundred sixty-five".