61599887 has 2 divisors, whose sum is σ = 61599888. Its totient is φ = 61599886.

The previous prime is 61599877. The next prime is 61599907. The reversal of 61599887 is 78899516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61599887 - 2⁸ = 61599631 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61599817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30799943 + 30799944.

It is an arithmetic number, because the mean of its divisors is an integer number (30799944).

Almost surely, 2^61599887 is an apocalyptic number.

61599887 is a deficient number, since it is larger than the sum of its proper divisors (1).

61599887 is an equidigital number, since it uses as much as digits as its factorization.

61599887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 53.

The square root of 61599887 is about 7848.5595493696. The cubic root of 61599887 is about 394.9359229500.

The spelling of 61599887 in words is "sixty-one million, five hundred ninety-nine thousand, eight hundred eighty-seven".