77315423 has 4 divisors (see below), whose sum is σ = 78960480. Its totient is φ = 75670368.

The previous prime is 77315369. The next prime is 77315449. The reversal of 77315423 is 32451377.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77315423 - 2¹⁰ = 77314399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77315423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77315453) 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, 822458 + ... + 822551.

It is an arithmetic number, because the mean of its divisors is an integer number (19740120).

Almost surely, 2^77315423 is an apocalyptic number.

77315423 is a deficient number, since it is larger than the sum of its proper divisors (1645057).

77315423 is a wasteful number, since it uses less digits than its factorization.

77315423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645056.

The product of its digits is 17640, while the sum is 32.

The square root of 77315423 is about 8792.9189123976. The cubic root of 77315423 is about 426.0122087944.

The spelling of 77315423 in words is "seventy-seven million, three hundred fifteen thousand, four hundred twenty-three".