78179413 has 12 divisors (see below), whose sum is σ = 89441380. Its totient is φ = 67917312.

The previous prime is 78179401. The next prime is 78179417. The reversal of 78179413 is 31497187.

It can be written as a sum of positive squares in 6 ways, for example, as 69169 + 78110244 = 263^2 + 8838^2 .

It is not a de Polignac number, because 78179413 - 2²¹ = 76082261 is a prime.

It is a super-2 number, since 2×78179413² = 12224041234049138, 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 (78179417) 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, 6648 + ... + 14161.

Almost surely, 2^78179413 is an apocalyptic number.

It is an amenable number.

78179413 is a deficient number, since it is larger than the sum of its proper divisors (11261967).

78179413 is a wasteful number, since it uses less digits than its factorization.

78179413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20856 (or 20839 counting only the distinct ones).

The product of its digits is 42336, while the sum is 40.

The square root of 78179413 is about 8841.9122931637. The cubic root of 78179413 is about 427.5932115524.

The spelling of 78179413 in words is "seventy-eight million, one hundred seventy-nine thousand, four hundred thirteen".