77146971 has 16 divisors (see below), whose sum is σ = 112589568. Its totient is φ = 46599200.

The previous prime is 77146963. The next prime is 77146981. The reversal of 77146971 is 17964177.

It is a cyclic number.

It is not a de Polignac number, because 77146971 - 2³ = 77146963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77146981) 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, 6505 + ... + 14021.

It is an arithmetic number, because the mean of its divisors is an integer number (7036848).

Almost surely, 2^77146971 is an apocalyptic number.

77146971 is a deficient number, since it is larger than the sum of its proper divisors (35442597).

77146971 is a wasteful number, since it uses less digits than its factorization.

77146971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7842.

The product of its digits is 74088, while the sum is 42.

The square root of 77146971 is about 8783.3348450347. The cubic root of 77146971 is about 425.7025905798.

The spelling of 77146971 in words is "seventy-seven million, one hundred forty-six thousand, nine hundred seventy-one".