78675969 has 16 divisors (see below), whose sum is σ = 108158400. Its totient is φ = 50846976.

The previous prime is 78675953. The next prime is 78675991. The reversal of 78675969 is 96957687.

It is not a de Polignac number, because 78675969 - 2⁴ = 78675953 is a prime.

It is a super-2 number, since 2×78675969² = 12379816196177922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78675929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9877 + ... + 15965.

It is an arithmetic number, because the mean of its divisors is an integer number (6759900).

It is a Proth number, since it is equal to 2401 ⋅ 2¹⁵ + 1 and 2401 < 2¹⁵.

Almost surely, 2^78675969 is an apocalyptic number.

It is an amenable number.

78675969 is a deficient number, since it is larger than the sum of its proper divisors (29482431).

78675969 is a wasteful number, since it uses less digits than its factorization.

78675969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6224.

The product of its digits is 5715360, while the sum is 57.

The square root of 78675969 is about 8869.9475195742. The cubic root of 78675969 is about 428.4965867565.

The spelling of 78675969 in words is "seventy-eight million, six hundred seventy-five thousand, nine hundred sixty-nine".