78094969 has 2 divisors, whose sum is σ = 78094970. Its totient is φ = 78094968.

The previous prime is 78094943. The next prime is 78094979. The reversal of 78094969 is 96949087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77211369 + 883600 = 8787^2 + 940^2 .

It is an emirp because it is prime and its reverse (96949087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78094969 - 2¹¹ = 78092921 is a prime.

It is a super-2 number, since 2×78094969² = 12197648366221922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78094979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39047484 + 39047485.

It is an arithmetic number, because the mean of its divisors is an integer number (39047485).

Almost surely, 2^78094969 is an apocalyptic number.

It is an amenable number.

78094969 is a deficient number, since it is larger than the sum of its proper divisors (1).

78094969 is an equidigital number, since it uses as much as digits as its factorization.

78094969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 78094969 is about 8837.1357916465. The cubic root of 78094969 is about 427.4392038756.

The spelling of 78094969 in words is "seventy-eight million, ninety-four thousand, nine hundred sixty-nine".