78974269 has 4 divisors (see below), whose sum is σ = 86153760. Its totient is φ = 71794780.

The previous prime is 78974227. The next prime is 78974309. The reversal of 78974269 is 96247987.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96247987 = 11 ⋅8749817.

It is a cyclic number.

It is not a de Polignac number, because 78974269 - 2¹⁵ = 78941501 is a prime.

It is a super-2 number, since 2×78974269² = 12473870328168722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78974209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3589729 + ... + 3589750.

It is an arithmetic number, because the mean of its divisors is an integer number (21538440).

Almost surely, 2^78974269 is an apocalyptic number.

It is an amenable number.

78974269 is a deficient number, since it is larger than the sum of its proper divisors (7179491).

78974269 is a wasteful number, since it uses less digits than its factorization.

78974269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7179490.

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

The square root of 78974269 is about 8886.7468175930. The cubic root of 78974269 is about 429.0374521524.

The spelling of 78974269 in words is "seventy-eight million, nine hundred seventy-four thousand, two hundred sixty-nine".