78955379 has 2 divisors, whose sum is σ = 78955380. Its totient is φ = 78955378.

The previous prime is 78955369. The next prime is 78955391. The reversal of 78955379 is 97355987.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78955379 - 2¹² = 78951283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78955379.

It is not a weakly prime, because it can be changed into another prime (78955369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39477689 + 39477690.

It is an arithmetic number, because the mean of its divisors is an integer number (39477690).

Almost surely, 2^78955379 is an apocalyptic number.

78955379 is a deficient number, since it is larger than the sum of its proper divisors (1).

78955379 is an equidigital number, since it uses as much as digits as its factorization.

78955379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2381400, while the sum is 53.

The square root of 78955379 is about 8885.6839354098. The cubic root of 78955379 is about 429.0032420067.

The spelling of 78955379 in words is "seventy-eight million, nine hundred fifty-five thousand, three hundred seventy-nine".