78396107 has 2 divisors, whose sum is σ = 78396108. Its totient is φ = 78396106.

The previous prime is 78396091. The next prime is 78396113. The reversal of 78396107 is 70169387.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78396107 - 2⁴ = 78396091 is a prime.

It is a super-2 number, since 2×78396107² = 12291899185510898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78396137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39198053 + 39198054.

It is an arithmetic number, because the mean of its divisors is an integer number (39198054).

Almost surely, 2^78396107 is an apocalyptic number.

78396107 is a deficient number, since it is larger than the sum of its proper divisors (1).

78396107 is an equidigital number, since it uses as much as digits as its factorization.

78396107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 78396107 is about 8854.1576109758. The cubic root of 78396107 is about 427.9879079910.

The spelling of 78396107 in words is "seventy-eight million, three hundred ninety-six thousand, one hundred seven".