77240797 has 4 divisors (see below), whose sum is σ = 77276160. Its totient is φ = 77205436.

The previous prime is 77240791. The next prime is 77240837. The reversal of 77240797 is 79704277.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77240797 is a prime.

It is a super-2 number, since 2×77240797² = 11932281442390418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77240791) 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, 14173 + ... + 18850.

It is an arithmetic number, because the mean of its divisors is an integer number (19319040).

Almost surely, 2^77240797 is an apocalyptic number.

It is an amenable number.

77240797 is a deficient number, since it is larger than the sum of its proper divisors (35363).

77240797 is a wasteful number, since it uses less digits than its factorization.

77240797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35362.

The product of its (nonzero) digits is 172872, while the sum is 43.

The square root of 77240797 is about 8788.6743596517. The cubic root of 77240797 is about 425.8751002248.

The spelling of 77240797 in words is "seventy-seven million, two hundred forty thousand, seven hundred ninety-seven".