87779023 has 2 divisors, whose sum is σ = 87779024. Its totient is φ = 87779022.

The previous prime is 87778997. The next prime is 87779047. The reversal of 87779023 is 32097778.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87779023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87779093) 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, 43889511 + 43889512.

It is an arithmetic number, because the mean of its divisors is an integer number (43889512).

Almost surely, 2^87779023 is an apocalyptic number.

87779023 is a deficient number, since it is larger than the sum of its proper divisors (1).

87779023 is an equidigital number, since it uses as much as digits as its factorization.

87779023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 87779023 is about 9369.0460026622. The cubic root of 87779023 is about 444.4233966120.

The spelling of 87779023 in words is "eighty-seven million, seven hundred seventy-nine thousand, twenty-three".