78252999 has 12 divisors (see below), whose sum is σ = 114685368. Its totient is φ = 47425840.

The previous prime is 78252973. The next prime is 78253003. The reversal of 78252999 is 99925287.

It is not a de Polignac number, because 78252999 - 2⁷ = 78252871 is a prime.

It is a super-2 number, since 2×78252999² = 12247063704988002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78252919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107424 + ... + 108149.

It is an arithmetic number, because the mean of its divisors is an integer number (9557114).

Almost surely, 2^78252999 is an apocalyptic number.

78252999 is a deficient number, since it is larger than the sum of its proper divisors (36432369).

78252999 is a wasteful number, since it uses less digits than its factorization.

78252999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215598 (or 215587 counting only the distinct ones).

The product of its digits is 816480, while the sum is 51.

The square root of 78252999 is about 8846.0725183553. The cubic root of 78252999 is about 427.7273261740.

The spelling of 78252999 in words is "seventy-eight million, two hundred fifty-two thousand, nine hundred ninety-nine".