77532493 has 2 divisors, whose sum is σ = 77532494. Its totient is φ = 77532492.

The previous prime is 77532491. The next prime is 77532523. The reversal of 77532493 is 39423577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63968004 + 13564489 = 7998^2 + 3683^2 .

It is a cyclic number.

It is not a de Polignac number, because 77532493 - 2¹ = 77532491 is a prime.

It is a super-2 number, since 2×77532493² = 12022574941590098, which contains 22 as substring.

Together with 77532491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77532491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38766246 + 38766247.

It is an arithmetic number, because the mean of its divisors is an integer number (38766247).

Almost surely, 2^77532493 is an apocalyptic number.

It is an amenable number.

77532493 is a deficient number, since it is larger than the sum of its proper divisors (1).

77532493 is an equidigital number, since it uses as much as digits as its factorization.

77532493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 40.

The square root of 77532493 is about 8805.2537158222. The cubic root of 77532493 is about 426.4105254469.

The spelling of 77532493 in words is "seventy-seven million, five hundred thirty-two thousand, four hundred ninety-three".