87798579 has 16 divisors (see below), whose sum is σ = 128024064. Its totient is φ = 53079200.

The previous prime is 87798569. The next prime is 87798587. The reversal of 87798579 is 97589778.

87798579 = T₁₂₈₂ + T₁₂₈₃ + ... + T₁₃₈₀.

It is a cyclic number.

It is not a de Polignac number, because 87798579 - 2¹⁷ = 87667507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87798509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11137 + ... + 17309.

It is an arithmetic number, because the mean of its divisors is an integer number (8001504).

Almost surely, 2^87798579 is an apocalyptic number.

87798579 is a deficient number, since it is larger than the sum of its proper divisors (40225485).

87798579 is a wasteful number, since it uses less digits than its factorization.

87798579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6618.

The product of its digits is 8890560, while the sum is 60.

The square root of 87798579 is about 9370.0895940220. The cubic root of 87798579 is about 444.4563980373.

The spelling of 87798579 in words is "eighty-seven million, seven hundred ninety-eight thousand, five hundred seventy-nine".