78767897 has 16 divisors (see below), whose sum is σ = 87494400. Its totient is φ = 70459200.

The previous prime is 78767879. The next prime is 78767917. The reversal of 78767897 is 79876787.

It is a cyclic number.

It is not a de Polignac number, because 78767897 - 2⁶ = 78767833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78767197) 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, 55604 + ... + 57002.

It is an arithmetic number, because the mean of its divisors is an integer number (5468400).

Almost surely, 2^78767897 is an apocalyptic number.

It is an amenable number.

78767897 is a deficient number, since it is larger than the sum of its proper divisors (8726503).

78767897 is a wasteful number, since it uses less digits than its factorization.

78767897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544.

The product of its digits is 8297856, while the sum is 59.

The square root of 78767897 is about 8875.1279990770. The cubic root of 78767897 is about 428.6634123779.

The spelling of 78767897 in words is "seventy-eight million, seven hundred sixty-seven thousand, eight hundred ninety-seven".