77359481 has 2 divisors, whose sum is σ = 77359482. Its totient is φ = 77359480.

The previous prime is 77359441. The next prime is 77359493. The reversal of 77359481 is 18495377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48372025 + 28987456 = 6955^2 + 5384^2 .

It is a cyclic number.

It is not a de Polignac number, because 77359481 - 2⁶ = 77359417 is a prime.

It is a super-2 number, since 2×77359481² = 11968978601178722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77359411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38679740 + 38679741.

It is an arithmetic number, because the mean of its divisors is an integer number (38679741).

Almost surely, 2^77359481 is an apocalyptic number.

It is an amenable number.

77359481 is a deficient number, since it is larger than the sum of its proper divisors (1).

77359481 is an equidigital number, since it uses as much as digits as its factorization.

77359481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The square root of 77359481 is about 8795.4238669890. The cubic root of 77359481 is about 426.0931140915.

The spelling of 77359481 in words is "seventy-seven million, three hundred fifty-nine thousand, four hundred eighty-one".