961506131 has 2 divisors, whose sum is σ = 961506132. Its totient is φ = 961506130.

The previous prime is 961506109. The next prime is 961506149. The reversal of 961506131 is 131605169.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 961506131 - 2¹⁰ = 961505107 is a prime.

It is a super-2 number, since 2×961506131² = 1848988079901178322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (961506181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480753065 + 480753066.

It is an arithmetic number, because the mean of its divisors is an integer number (480753066).

Almost surely, 2^961506131 is an apocalyptic number.

961506131 is a deficient number, since it is larger than the sum of its proper divisors (1).

961506131 is an equidigital number, since it uses as much as digits as its factorization.

961506131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 961506131 is about 31008.1623286515. The cubic root of 961506131 is about 987.0004544042. Note that the first 3 decimals are identical.

The spelling of 961506131 in words is "nine hundred sixty-one million, five hundred six thousand, one hundred thirty-one".