78616469 has 4 divisors (see below), whose sum is σ = 78637920. Its totient is φ = 78595020.

The previous prime is 78616457. The next prime is 78616487. The reversal of 78616469 is 96461687.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78616469 is a prime.

It is a super-2 number, since 2×78616469² = 12361098396055922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78616669) 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, 3689 + ... + 13070.

It is an arithmetic number, because the mean of its divisors is an integer number (19659480).

Almost surely, 2^78616469 is an apocalyptic number.

It is an amenable number.

78616469 is a deficient number, since it is larger than the sum of its proper divisors (21451).

78616469 is a wasteful number, since it uses less digits than its factorization.

78616469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21450.

The product of its digits is 435456, while the sum is 47.

The square root of 78616469 is about 8866.5928631014. The cubic root of 78616469 is about 428.3885403094.

The spelling of 78616469 in words is "seventy-eight million, six hundred sixteen thousand, four hundred sixty-nine".