77984645 has 8 divisors (see below), whose sum is σ = 98507040. Its totient is φ = 59104080.

The previous prime is 77984597. The next prime is 77984653. The reversal of 77984645 is 54648977.

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

It is not a de Polignac number, because 77984645 - 2⁶ = 77984581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77984593 and 77984602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410351 + ... + 410540.

It is an arithmetic number, because the mean of its divisors is an integer number (12313380).

Almost surely, 2^77984645 is an apocalyptic number.

It is an amenable number.

77984645 is a deficient number, since it is larger than the sum of its proper divisors (20522395).

77984645 is a wasteful number, since it uses less digits than its factorization.

77984645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820915.

The product of its digits is 1693440, while the sum is 50.

The square root of 77984645 is about 8830.8915178480. The cubic root of 77984645 is about 427.2378292896.

The spelling of 77984645 in words is "seventy-seven million, nine hundred eighty-four thousand, six hundred forty-five".