78401713 has 4 divisors (see below), whose sum is σ = 84432628. Its totient is φ = 72370800.

The previous prime is 78401693. The next prime is 78401723. The reversal of 78401713 is 31710487.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26388769 + 52012944 = 5137^2 + 7212^2 .

It is a cyclic number.

It is not a de Polignac number, because 78401713 - 2¹³ = 78393521 is a prime.

It is a super-2 number, since 2×78401713² = 12293657202668738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78401723) 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 3 ways as a sum of consecutive naturals, for example, 3015438 + ... + 3015463.

It is an arithmetic number, because the mean of its divisors is an integer number (21108157).

Almost surely, 2^78401713 is an apocalyptic number.

It is an amenable number.

78401713 is a deficient number, since it is larger than the sum of its proper divisors (6030915).

78401713 is a wasteful number, since it uses less digits than its factorization.

78401713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6030914.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 78401713 is about 8854.4741797579. The cubic root of 78401713 is about 427.9981093607.

The spelling of 78401713 in words is "seventy-eight million, four hundred one thousand, seven hundred thirteen".