77453231 has 2 divisors, whose sum is σ = 77453232. Its totient is φ = 77453230.

The previous prime is 77453197. The next prime is 77453249. The reversal of 77453231 is 13235477.

It is a strong prime.

It is an emirp because it is prime and its reverse (13235477) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77453231 is a prime.

It is a super-2 number, since 2×77453231² = 11998005984678722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77450231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38726615 + 38726616.

It is an arithmetic number, because the mean of its divisors is an integer number (38726616).

Almost surely, 2^77453231 is an apocalyptic number.

77453231 is a deficient number, since it is larger than the sum of its proper divisors (1).

77453231 is an equidigital number, since it uses as much as digits as its factorization.

77453231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 32.

The square root of 77453231 is about 8800.7517292559. The cubic root of 77453231 is about 426.2651684331.

The spelling of 77453231 in words is "seventy-seven million, four hundred fifty-three thousand, two hundred thirty-one".