78498099 has 24 divisors (see below), whose sum is σ = 120476720. Its totient is φ = 50512896.

The previous prime is 78498059. The next prime is 78498151. The reversal of 78498099 is 99089487.

It is not a de Polignac number, because 78498099 - 2²⁰ = 77449523 is a prime.

It is a super-2 number, since 2×78498099² = 12323903093227602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78498059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20979 + ... + 24435.

Almost surely, 2^78498099 is an apocalyptic number.

78498099 is a deficient number, since it is larger than the sum of its proper divisors (41978621).

78498099 is a wasteful number, since it uses less digits than its factorization.

78498099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524 (or 3489 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 78498099 is about 8859.9152930488. The cubic root of 78498099 is about 428.1734292206.

The spelling of 78498099 in words is "seventy-eight million, four hundred ninety-eight thousand, ninety-nine".