77920054 has 16 divisors (see below), whose sum is σ = 119554992. Its totient is φ = 38078208.

The previous prime is 77920043. The next prime is 77920057. The reversal of 77920054 is 45002977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77920057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14137 + ... + 18859.

It is an arithmetic number, because the mean of its divisors is an integer number (7472187).

Almost surely, 2^77920054 is an apocalyptic number.

77920054 is a deficient number, since it is larger than the sum of its proper divisors (41634938).

77920054 is a wasteful number, since it uses less digits than its factorization.

77920054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4911.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 77920054 is about 8827.2336550020. The cubic root of 77920054 is about 427.1198430677.

The spelling of 77920054 in words is "seventy-seven million, nine hundred twenty thousand, fifty-four".