78413291 has 16 divisors (see below), whose sum is σ = 88777728. Its totient is φ = 68613600.

The previous prime is 78413287. The next prime is 78413311. The reversal of 78413291 is 19231487.

It is not a de Polignac number, because 78413291 - 2² = 78413287 is a prime.

It is a super-2 number, since 2×78413291² = 12297288410901362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78413261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76901 + ... + 77913.

It is an arithmetic number, because the mean of its divisors is an integer number (5548608).

Almost surely, 2^78413291 is an apocalyptic number.

78413291 is a deficient number, since it is larger than the sum of its proper divisors (10364437).

78413291 is a wasteful number, since it uses less digits than its factorization.

78413291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282.

The product of its digits is 12096, while the sum is 35.

The square root of 78413291 is about 8855.1279493862. The cubic root of 78413291 is about 428.0191765799.

The spelling of 78413291 in words is "seventy-eight million, four hundred thirteen thousand, two hundred ninety-one".