77679542 has 4 divisors (see below), whose sum is σ = 116519316. Its totient is φ = 38839770.

The previous prime is 77679529. The next prime is 77679551. The reversal of 77679542 is 24597677.

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

It is a super-2 number, since 2×77679542² = 12068222490659528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19419884 + ... + 19419887.

It is an arithmetic number, because the mean of its divisors is an integer number (29129829).

Almost surely, 2^77679542 is an apocalyptic number.

77679542 is a deficient number, since it is larger than the sum of its proper divisors (38839774).

77679542 is a wasteful number, since it uses less digits than its factorization.

77679542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38839773.

The product of its digits is 740880, while the sum is 47.

The square root of 77679542 is about 8813.5998320777. The cubic root of 77679542 is about 426.6799335339.

The spelling of 77679542 in words is "seventy-seven million, six hundred seventy-nine thousand, five hundred forty-two".