77425487 has 4 divisors (see below), whose sum is σ = 77478840. Its totient is φ = 77372136.

The previous prime is 77425477. The next prime is 77425501. The reversal of 77425487 is 78452477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78452477 = 59 ⋅1329703.

It is a cyclic number.

It is not a de Polignac number, because 77425487 - 2²⁶ = 10316623 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 (77425417) 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, 24437 + ... + 27422.

It is an arithmetic number, because the mean of its divisors is an integer number (19369710).

Almost surely, 2^77425487 is an apocalyptic number.

77425487 is a deficient number, since it is larger than the sum of its proper divisors (53353).

77425487 is a wasteful number, since it uses less digits than its factorization.

77425487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53352.

The product of its digits is 439040, while the sum is 44.

The square root of 77425487 is about 8799.1753590891. The cubic root of 77425487 is about 426.2142658302.

The spelling of 77425487 in words is "seventy-seven million, four hundred twenty-five thousand, four hundred eighty-seven".