78274087 has 2 divisors, whose sum is σ = 78274088. Its totient is φ = 78274086.

The previous prime is 78274081. The next prime is 78274109. The reversal of 78274087 is 78047287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78274087 - 2⁷ = 78273959 is a prime.

It is a super-2 number, since 2×78274087² = 12253665391367138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78274081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39137043 + 39137044.

It is an arithmetic number, because the mean of its divisors is an integer number (39137044).

Almost surely, 2^78274087 is an apocalyptic number.

78274087 is a deficient number, since it is larger than the sum of its proper divisors (1).

78274087 is an equidigital number, since it uses as much as digits as its factorization.

78274087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 175616, while the sum is 43.

The square root of 78274087 is about 8847.2643794565. The cubic root of 78274087 is about 427.7657447388.

The spelling of 78274087 in words is "seventy-eight million, two hundred seventy-four thousand, eighty-seven".