77913047 has 4 divisors (see below), whose sum is σ = 77936856. Its totient is φ = 77889240.

The previous prime is 77913041. The next prime is 77913049. The reversal of 77913047 is 74031977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74031977 = 1249 ⋅59273.

It is a cyclic number.

It is not a de Polignac number, because 77913047 - 2²⁴ = 61135831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77913047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77913041) 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, 6029 + ... + 13862.

It is an arithmetic number, because the mean of its divisors is an integer number (19484214).

Almost surely, 2^77913047 is an apocalyptic number.

77913047 is a deficient number, since it is larger than the sum of its proper divisors (23809).

77913047 is a wasteful number, since it uses less digits than its factorization.

77913047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23808.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 77913047 is about 8826.8367493684. The cubic root of 77913047 is about 427.1070396951.

The spelling of 77913047 in words is "seventy-seven million, nine hundred thirteen thousand, forty-seven".