77053969 has 4 divisors (see below), whose sum is σ = 77174820. Its totient is φ = 76933120.

The previous prime is 77053939. The next prime is 77054023. The reversal of 77053969 is 96935077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96935077 = 6211 ⋅15607.

It can be written as a sum of positive squares in 2 ways, for example, as 35283600 + 41770369 = 5940^2 + 6463^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77053969 is a prime.

It is a super-2 number, since 2×77053969² = 11874628277305922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77053939) 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, 59464 + ... + 60745.

It is an arithmetic number, because the mean of its divisors is an integer number (19293705).

Almost surely, 2^77053969 is an apocalyptic number.

It is an amenable number.

77053969 is a deficient number, since it is larger than the sum of its proper divisors (120851).

77053969 is a wasteful number, since it uses less digits than its factorization.

77053969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120850.

The product of its (nonzero) digits is 357210, while the sum is 46.

The square root of 77053969 is about 8778.0390179128. The cubic root of 77053969 is about 425.5314578628.

The spelling of 77053969 in words is "seventy-seven million, fifty-three thousand, nine hundred sixty-nine".