78995269 has 2 divisors, whose sum is σ = 78995270. Its totient is φ = 78995268.

The previous prime is 78995263. The next prime is 78995291. The reversal of 78995269 is 96259987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78588225 + 407044 = 8865^2 + 638^2 .

It is a cyclic number.

It is not a de Polignac number, because 78995269 - 2³ = 78995261 is a prime.

It is a super-2 number, since 2×78995269² = 12480505048764722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78995261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39497634 + 39497635.

It is an arithmetic number, because the mean of its divisors is an integer number (39497635).

Almost surely, 2^78995269 is an apocalyptic number.

It is an amenable number.

78995269 is a deficient number, since it is larger than the sum of its proper divisors (1).

78995269 is an equidigital number, since it uses as much as digits as its factorization.

78995269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 55.

The square root of 78995269 is about 8887.9282737880. The cubic root of 78995269 is about 429.0754771451.

The spelling of 78995269 in words is "seventy-eight million, nine hundred ninety-five thousand, two hundred sixty-nine".