77239997 has 8 divisors (see below), whose sum is σ = 83196960. Its totient is φ = 71472240.

The previous prime is 77239991. The next prime is 77239999. The reversal of 77239997 is 79993277.

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 77239997 - 2⁶ = 77239933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77239991) 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, 46454 + ... + 48087.

It is an arithmetic number, because the mean of its divisors is an integer number (10399620).

Almost surely, 2^77239997 is an apocalyptic number.

It is an amenable number.

77239997 is a deficient number, since it is larger than the sum of its proper divisors (5956963).

77239997 is a wasteful number, since it uses less digits than its factorization.

77239997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94603.

The product of its digits is 1500282, while the sum is 53.

The square root of 77239997 is about 8788.6288464128. The cubic root of 77239997 is about 425.8736299256.

The spelling of 77239997 in words is "seventy-seven million, two hundred thirty-nine thousand, nine hundred ninety-seven".