99980539 has 2 divisors, whose sum is σ = 99980540. Its totient is φ = 99980538.

The previous prime is 99980513. The next prime is 99980597. The reversal of 99980539 is 93508999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99980539 is a prime.

It is a super-2 number, since 2×99980539² = 19992216357461042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99986539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49990269 + 49990270.

It is an arithmetic number, because the mean of its divisors is an integer number (49990270).

Almost surely, 2^99980539 is an apocalyptic number.

99980539 is a deficient number, since it is larger than the sum of its proper divisors (1).

99980539 is an equidigital number, since it uses as much as digits as its factorization.

99980539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 787320, while the sum is 52.

The square root of 99980539 is about 9999.0269026541. The cubic root of 99980539 is about 464.1287714211.

The spelling of 99980539 in words is "ninety-nine million, nine hundred eighty thousand, five hundred thirty-nine".