78314147 has 2 divisors, whose sum is σ = 78314148. Its totient is φ = 78314146.

The previous prime is 78314101. The next prime is 78314221. The reversal of 78314147 is 74141387.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78314147 - 2¹⁴ = 78297763 is a prime.

It is a super-2 number, since 2×78314147² = 12266211240675218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78314347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39157073 + 39157074.

It is an arithmetic number, because the mean of its divisors is an integer number (39157074).

Almost surely, 2^78314147 is an apocalyptic number.

78314147 is a deficient number, since it is larger than the sum of its proper divisors (1).

78314147 is an equidigital number, since it uses as much as digits as its factorization.

78314147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 35.

The square root of 78314147 is about 8849.5280665129. The cubic root of 78314147 is about 427.8387078943.

The spelling of 78314147 in words is "seventy-eight million, three hundred fourteen thousand, one hundred forty-seven".