78876069 has 4 divisors (see below), whose sum is σ = 105168096. Its totient is φ = 52584044.

The previous prime is 78876053. The next prime is 78876079. The reversal of 78876069 is 96067887.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96067887 = 3 ⋅32022629.

It is a cyclic number.

It is not a de Polignac number, because 78876069 - 2⁴ = 78876053 is a prime.

It is a super-2 number, since 2×78876069² = 12442868521785522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78876019) 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, 13146009 + ... + 13146014.

It is an arithmetic number, because the mean of its divisors is an integer number (26292024).

Almost surely, 2^78876069 is an apocalyptic number.

It is an amenable number.

78876069 is a deficient number, since it is larger than the sum of its proper divisors (26292027).

78876069 is a wasteful number, since it uses less digits than its factorization.

78876069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26292026.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 78876069 is about 8881.2200175426. The cubic root of 78876069 is about 428.8595505265.

The spelling of 78876069 in words is "seventy-eight million, eight hundred seventy-six thousand, sixty-nine".