961969136 has 20 divisors (see below), whose sum is σ = 1864780200. Its totient is φ = 480735552.

The previous prime is 961969117. The next prime is 961969139. The reversal of 961969136 is 631969169.

It is a happy number.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961969139) 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, 18575 + ... + 47633.

It is an arithmetic number, because the mean of its divisors is an integer number (93239010).

Almost surely, 2^961969136 is an apocalyptic number.

It is an amenable number.

961969136 is a deficient number, since it is larger than the sum of its proper divisors (902811064).

961969136 is a wasteful number, since it uses less digits than its factorization.

961969136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31136 (or 31130 counting only the distinct ones).

The product of its digits is 472392, while the sum is 50.

The square root of 961969136 is about 31015.6272869017. The cubic root of 961969136 is about 987.1588561719.

The spelling of 961969136 in words is "nine hundred sixty-one million, nine hundred sixty-nine thousand, one hundred thirty-six".