78057499 has 16 divisors (see below), whose sum is σ = 86238432. Its totient is φ = 70207488.

The previous prime is 78057493. The next prime is 78057503. The reversal of 78057499 is 99475087.

It is a happy number.

It is not a de Polignac number, because 78057499 - 2⁵ = 78057467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78057493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132684 + ... + 133270.

It is an arithmetic number, because the mean of its divisors is an integer number (5389902).

Almost surely, 2^78057499 is an apocalyptic number.

78057499 is a deficient number, since it is larger than the sum of its proper divisors (8180933).

78057499 is a wasteful number, since it uses less digits than its factorization.

78057499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 78057499 is about 8835.0155064946. The cubic root of 78057499 is about 427.3708311009.

The spelling of 78057499 in words is "seventy-eight million, fifty-seven thousand, four hundred ninety-nine".