77427497 has 12 divisors (see below), whose sum is σ = 90222336. Its totient is φ = 66253320.

The previous prime is 77427479. The next prime is 77427521. The reversal of 77427497 is 79472477.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-77427497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77427457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41372 + ... + 43202.

It is an arithmetic number, because the mean of its divisors is an integer number (7518528).

Almost surely, 2^77427497 is an apocalyptic number.

It is an amenable number.

77427497 is a deficient number, since it is larger than the sum of its proper divisors (12794839).

77427497 is a wasteful number, since it uses less digits than its factorization.

77427497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708 (or 2701 counting only the distinct ones).

The product of its digits is 691488, while the sum is 47.

The square root of 77427497 is about 8799.2895735963. The cubic root of 77427497 is about 426.2179540354.

The spelling of 77427497 in words is "seventy-seven million, four hundred twenty-seven thousand, four hundred ninety-seven".