77531053 has 2 divisors, whose sum is σ = 77531054. Its totient is φ = 77531052.

The previous prime is 77531029. The next prime is 77531071. The reversal of 77531053 is 35013577.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46416969 + 31114084 = 6813^2 + 5578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77531053 is a prime.

It is a super-2 number, since 2×77531053² = 12022128358577618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77531353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38765526 + 38765527.

It is an arithmetic number, because the mean of its divisors is an integer number (38765527).

Almost surely, 2^77531053 is an apocalyptic number.

It is an amenable number.

77531053 is a deficient number, since it is larger than the sum of its proper divisors (1).

77531053 is an equidigital number, since it uses as much as digits as its factorization.

77531053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11025, while the sum is 31.

The square root of 77531053 is about 8805.1719460781. The cubic root of 77531053 is about 426.4078855432.

The spelling of 77531053 in words is "seventy-seven million, five hundred thirty-one thousand, fifty-three".