78233013 has 16 divisors (see below), whose sum is σ = 122001600. Its totient is φ = 49410000.

The previous prime is 78233003. The next prime is 78233017. The reversal of 78233013 is 31033287.

It is not a de Polignac number, because 78233013 - 2¹³ = 78224821 is a prime.

It is a super-2 number, since 2×78233013² = 12240808646116338, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78233017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75738 + ... + 76763.

It is an arithmetic number, because the mean of its divisors is an integer number (7625100).

Almost surely, 2^78233013 is an apocalyptic number.

It is an amenable number.

78233013 is a deficient number, since it is larger than the sum of its proper divisors (43768587).

78233013 is a wasteful number, since it uses less digits than its factorization.

78233013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152529 (or 152523 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 78233013 is about 8844.9427923532. The cubic root of 78233013 is about 427.6909088851.

The spelling of 78233013 in words is "seventy-eight million, two hundred thirty-three thousand, thirteen".