78329901 has 32 divisors (see below), whose sum is σ = 117956608. Its totient is φ = 45904320.

The previous prime is 78329869. The next prime is 78329939. The reversal of 78329901 is 10992387.

It is not a de Polignac number, because 78329901 - 2⁵ = 78329869 is a prime.

It is a super-2 number, since 2×78329901² = 12271146781339602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78329901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78329941) 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 31 ways as a sum of consecutive naturals, for example, 80520 + ... + 81486.

It is an arithmetic number, because the mean of its divisors is an integer number (3686144).

Almost surely, 2^78329901 is an apocalyptic number.

It is an amenable number.

78329901 is a deficient number, since it is larger than the sum of its proper divisors (39626707).

78329901 is a wasteful number, since it uses less digits than its factorization.

78329901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 78329901 is about 8850.4181257159. The cubic root of 78329901 is about 427.8673945763.

The spelling of 78329901 in words is "seventy-eight million, three hundred twenty-nine thousand, nine hundred one".