77920053 has 4 divisors (see below), whose sum is σ = 103893408. Its totient is φ = 51946700.

The previous prime is 77920043. The next prime is 77920057. The reversal of 77920053 is 35002977.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35002977 = 3 ⋅11667659.

It is a cyclic number.

It is not a de Polignac number, because 77920053 - 2⁸ = 77919797 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77919996 and 77920023.

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 3 ways as a sum of consecutive naturals, for example, 12986673 + ... + 12986678.

It is an arithmetic number, because the mean of its divisors is an integer number (25973352).

Almost surely, 2^77920053 is an apocalyptic number.

It is an amenable number.

77920053 is a deficient number, since it is larger than the sum of its proper divisors (25973355).

77920053 is a wasteful number, since it uses less digits than its factorization.

77920053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25973354.

The product of its (nonzero) digits is 13230, while the sum is 33.

The square root of 77920053 is about 8827.2335983591. The cubic root of 77920053 is about 427.1198412406.

The spelling of 77920053 in words is "seventy-seven million, nine hundred twenty thousand, fifty-three".