87810623 has 2 divisors, whose sum is σ = 87810624. Its totient is φ = 87810622.

The previous prime is 87810607. The next prime is 87810629. The reversal of 87810623 is 32601878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87810623 - 2⁴ = 87810607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87810629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43905311 + 43905312.

It is an arithmetic number, because the mean of its divisors is an integer number (43905312).

Almost surely, 2^87810623 is an apocalyptic number.

87810623 is a deficient number, since it is larger than the sum of its proper divisors (1).

87810623 is an equidigital number, since it uses as much as digits as its factorization.

87810623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 87810623 is about 9370.7322552723. The cubic root of 87810623 is about 444.4767202649.

The spelling of 87810623 in words is "eighty-seven million, eight hundred ten thousand, six hundred twenty-three".