961978525 has 6 divisors (see below), whose sum is σ = 1192853402. Its totient is φ = 769582800.

The previous prime is 961978513. The next prime is 961978529. The reversal of 961978525 is 525879169.

961978525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 197290116 + 764688409 = 14046^2 + 27653^2 .

It is not a de Polignac number, because 961978525 - 2⁷ = 961978397 is a prime.

It is a super-2 number, since 2×961978525² = 1850805365122351250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961978529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19239546 + ... + 19239595.

Almost surely, 2^961978525 is an apocalyptic number.

It is an amenable number.

961978525 is a deficient number, since it is larger than the sum of its proper divisors (230874877).

961978525 is a wasteful number, since it uses less digits than its factorization.

961978525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38479151 (or 38479146 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 52.

The square root of 961978525 is about 31015.7786457152. The cubic root of 961978525 is about 987.1620677802.

The spelling of 961978525 in words is "nine hundred sixty-one million, nine hundred seventy-eight thousand, five hundred twenty-five".