961615087 has 2 divisors, whose sum is σ = 961615088. Its totient is φ = 961615086.

The previous prime is 961615043. The next prime is 961615091. The reversal of 961615087 is 780516169.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 961615087 - 2⁷ = 961614959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961615687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480807543 + 480807544.

It is an arithmetic number, because the mean of its divisors is an integer number (480807544).

Almost surely, 2^961615087 is an apocalyptic number.

961615087 is a deficient number, since it is larger than the sum of its proper divisors (1).

961615087 is an equidigital number, since it uses as much as digits as its factorization.

961615087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 961615087 is about 31009.9191711297. The cubic root of 961615087 is about 987.0377346517.

The spelling of 961615087 in words is "nine hundred sixty-one million, six hundred fifteen thousand, eighty-seven".