9901623587 has 2 divisors, whose sum is σ = 9901623588. Its totient is φ = 9901623586.

The previous prime is 9901623509. The next prime is 9901623601. The reversal of 9901623587 is 7853261099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9901623587 - 2¹⁸ = 9901361443 is a prime.

It is not a weakly prime, because it can be changed into another prime (9901628587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950811793 + 4950811794.

It is an arithmetic number, because the mean of its divisors is an integer number (4950811794).

Almost surely, 2^9901623587 is an apocalyptic number.

9901623587 is a deficient number, since it is larger than the sum of its proper divisors (1).

9901623587 is an equidigital number, since it uses as much as digits as its factorization.

9901623587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 9901623587 is about 99506.9022078368. The cubic root of 9901623587 is about 2147.3465435241.

The spelling of 9901623587 in words is "nine billion, nine hundred one million, six hundred twenty-three thousand, five hundred eighty-seven".