61618087 has 2 divisors, whose sum is σ = 61618088. Its totient is φ = 61618086.

The previous prime is 61618043. The next prime is 61618093. The reversal of 61618087 is 78081616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61618087 - 2²³ = 53229479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61618187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30809043 + 30809044.

It is an arithmetic number, because the mean of its divisors is an integer number (30809044).

Almost surely, 2^61618087 is an apocalyptic number.

61618087 is a deficient number, since it is larger than the sum of its proper divisors (1).

61618087 is an equidigital number, since it uses as much as digits as its factorization.

61618087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 61618087 is about 7849.7189121649. The cubic root of 61618087 is about 394.9748143959.

The spelling of 61618087 in words is "sixty-one million, six hundred eighteen thousand, eighty-seven".