78252623 has 2 divisors, whose sum is σ = 78252624. Its totient is φ = 78252622.

The previous prime is 78252611. The next prime is 78252653. The reversal of 78252623 is 32625287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78252623 - 2⁸ = 78252367 is a prime.

It is a super-2 number, since 2×78252623² = 12246946012760258, which contains 22 as substring.

It is equal to p_4573457 and since 78252623 and 4573457 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78252653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39126311 + 39126312.

It is an arithmetic number, because the mean of its divisors is an integer number (39126312).

Almost surely, 2^78252623 is an apocalyptic number.

78252623 is a deficient number, since it is larger than the sum of its proper divisors (1).

78252623 is an equidigital number, since it uses as much as digits as its factorization.

78252623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 78252623 is about 8846.0512659604. The cubic root of 78252623 is about 427.7266411066.

The spelling of 78252623 in words is "seventy-eight million, two hundred fifty-two thousand, six hundred twenty-three".