77906297 has 8 divisors (see below), whose sum is σ = 89117952. Its totient is φ = 66715200.

The previous prime is 77906293. The next prime is 77906299. The reversal of 77906297 is 79260977.

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

It is a cyclic number.

It is not a de Polignac number, because 77906297 - 2² = 77906293 is a prime.

It is a super-2 number, since 2×77906297² = 12138782224504418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77906293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4097 + ... + 13137.

It is an arithmetic number, because the mean of its divisors is an integer number (11139744).

Almost surely, 2^77906297 is an apocalyptic number.

It is an amenable number.

77906297 is a deficient number, since it is larger than the sum of its proper divisors (11211655).

77906297 is a wasteful number, since it uses less digits than its factorization.

77906297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10279.

The product of its (nonzero) digits is 333396, while the sum is 47.

The square root of 77906297 is about 8826.4543844060. The cubic root of 77906297 is about 427.0947051937.

The spelling of 77906297 in words is "seventy-seven million, nine hundred six thousand, two hundred ninety-seven".