77470047 has 32 divisors (see below), whose sum is σ = 119750400. Its totient is φ = 49454496.

The previous prime is 77470039. The next prime is 77470051. The reversal of 77470047 is 74007477.

It is not a de Polignac number, because 77470047 - 2³ = 77470039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77469993 and 77470020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77470067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60904 + ... + 62162.

It is an arithmetic number, because the mean of its divisors is an integer number (3742200).

Almost surely, 2^77470047 is an apocalyptic number.

77470047 is a deficient number, since it is larger than the sum of its proper divisors (42280353).

77470047 is a wasteful number, since it uses less digits than its factorization.

77470047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364 (or 1358 counting only the distinct ones).

The product of its (nonzero) digits is 38416, while the sum is 36.

The square root of 77470047 is about 8801.7070503397. The cubic root of 77470047 is about 426.2960152477.

The spelling of 77470047 in words is "seventy-seven million, four hundred seventy thousand, forty-seven".