78274123 has 2 divisors, whose sum is σ = 78274124. Its totient is φ = 78274122.

The previous prime is 78274111. The next prime is 78274159. The reversal of 78274123 is 32147287.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78274123 is a prime.

It is a super-2 number, since 2×78274123² = 12253676662838258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78274523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39137061 + 39137062.

It is an arithmetic number, because the mean of its divisors is an integer number (39137062).

Almost surely, 2^78274123 is an apocalyptic number.

78274123 is a deficient number, since it is larger than the sum of its proper divisors (1).

78274123 is an equidigital number, since it uses as much as digits as its factorization.

78274123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 34.

The square root of 78274123 is about 8847.2664139835. The cubic root of 78274123 is about 427.7658103184.

The spelling of 78274123 in words is "seventy-eight million, two hundred seventy-four thousand, one hundred twenty-three".