78373131 has 8 divisors (see below), whose sum is σ = 104578704. Its totient is φ = 52208160.

The previous prime is 78373123. The next prime is 78373151. The reversal of 78373131 is 13137387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78373131 - 2³ = 78373123 is a prime.

It is a super-2 number, since 2×78373131² = 12284695325486322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78373092 and 78373101.

It is not an unprimeable number, because it can be changed into a prime (78373151) 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 7 ways as a sum of consecutive naturals, for example, 5316 + ... + 13601.

It is an arithmetic number, because the mean of its divisors is an integer number (13072338).

Almost surely, 2^78373131 is an apocalyptic number.

78373131 is a deficient number, since it is larger than the sum of its proper divisors (26205573).

78373131 is a wasteful number, since it uses less digits than its factorization.

78373131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20301.

The product of its digits is 10584, while the sum is 33.

The square root of 78373131 is about 8852.8600463353. The cubic root of 78373131 is about 427.9460929428.

The spelling of 78373131 in words is "seventy-eight million, three hundred seventy-three thousand, one hundred thirty-one".