77151493 has 2 divisors, whose sum is σ = 77151494. Its totient is φ = 77151492.

The previous prime is 77151383. The next prime is 77151497. The reversal of 77151493 is 39415177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77141089 + 10404 = 8783^2 + 102^2 .

It is a cyclic number.

It is not a de Polignac number, because 77151493 - 2²¹ = 75054341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77151497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38575746 + 38575747.

It is an arithmetic number, because the mean of its divisors is an integer number (38575747).

Almost surely, 2^77151493 is an apocalyptic number.

It is an amenable number.

77151493 is a deficient number, since it is larger than the sum of its proper divisors (1).

77151493 is an equidigital number, since it uses as much as digits as its factorization.

77151493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 37.

The square root of 77151493 is about 8783.5922605731. The cubic root of 77151493 is about 425.7109079921.

The spelling of 77151493 in words is "seventy-seven million, one hundred fifty-one thousand, four hundred ninety-three".