961544431 has 2 divisors, whose sum is σ = 961544432. Its totient is φ = 961544430.

The previous prime is 961544369. The next prime is 961544473. The reversal of 961544431 is 134445169.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 961544431 - 2⁷ = 961544303 is a prime.

It is a super-2 number, since 2×961544431² = 1849135385574227522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961544491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480772215 + 480772216.

It is an arithmetic number, because the mean of its divisors is an integer number (480772216).

Almost surely, 2^961544431 is an apocalyptic number.

961544431 is a deficient number, since it is larger than the sum of its proper divisors (1).

961544431 is an equidigital number, since it uses as much as digits as its factorization.

961544431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 961544431 is about 31008.7799018278. The cubic root of 961544431 is about 987.0135594049.

The spelling of 961544431 in words is "nine hundred sixty-one million, five hundred forty-four thousand, four hundred thirty-one".