77457461 has 2 divisors, whose sum is σ = 77457462. Its totient is φ = 77457460.

The previous prime is 77457431. The next prime is 77457469. The reversal of 77457461 is 16475477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72573361 + 4884100 = 8519^2 + 2210^2 .

It is a cyclic number.

It is not a de Polignac number, because 77457461 - 2⁶ = 77457397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77457469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38728730 + 38728731.

It is an arithmetic number, because the mean of its divisors is an integer number (38728731).

Almost surely, 2^77457461 is an apocalyptic number.

It is an amenable number.

77457461 is a deficient number, since it is larger than the sum of its proper divisors (1).

77457461 is an equidigital number, since it uses as much as digits as its factorization.

77457461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164640, while the sum is 41.

The square root of 77457461 is about 8800.9920463548. The cubic root of 77457461 is about 426.2729282507.

The spelling of 77457461 in words is "seventy-seven million, four hundred fifty-seven thousand, four hundred sixty-one".