78927469 has 2 divisors, whose sum is σ = 78927470. Its totient is φ = 78927468.

The previous prime is 78927451. The next prime is 78927479. The reversal of 78927469 is 96472987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77211369 + 1716100 = 8787^2 + 1310^2 .

It is a cyclic number.

It is not a de Polignac number, because 78927469 - 2⁵ = 78927437 is a prime.

It is a super-2 number, since 2×78927469² = 12459090725491922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78927479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39463734 + 39463735.

It is an arithmetic number, because the mean of its divisors is an integer number (39463735).

Almost surely, 2^78927469 is an apocalyptic number.

It is an amenable number.

78927469 is a deficient number, since it is larger than the sum of its proper divisors (1).

78927469 is an equidigital number, since it uses as much as digits as its factorization.

78927469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The square root of 78927469 is about 8884.1132928391. The cubic root of 78927469 is about 428.9526864830.

The spelling of 78927469 in words is "seventy-eight million, nine hundred twenty-seven thousand, four hundred sixty-nine".