78534669 has 8 divisors (see below), whose sum is σ = 104753952. Its totient is φ = 52335920.

The previous prime is 78534649. The next prime is 78534689. The reversal of 78534669 is 96643587.

It is an interprime number because it is at equal distance from previous prime (78534649) and next prime (78534689).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78534669 - 2⁸ = 78534413 is a prime.

It is a super-2 number, since 2×78534669² = 12335388469879122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78534629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11434 + ... + 16964.

It is an arithmetic number, because the mean of its divisors is an integer number (13094244).

Almost surely, 2^78534669 is an apocalyptic number.

It is an amenable number.

78534669 is a deficient number, since it is larger than the sum of its proper divisors (26219283).

78534669 is a wasteful number, since it uses less digits than its factorization.

78534669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10267.

The product of its digits is 1088640, while the sum is 48.

The square root of 78534669 is about 8861.9788422225. The cubic root of 78534669 is about 428.2399101144.

The spelling of 78534669 in words is "seventy-eight million, five hundred thirty-four thousand, six hundred sixty-nine".