77481037 has 2 divisors, whose sum is σ = 77481038. Its totient is φ = 77481036.

The previous prime is 77481017. The next prime is 77481073. The reversal of 77481037 is 73018477.

Together with next prime (77481073) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76370121 + 1110916 = 8739^2 + 1054^2 .

It is a cyclic number.

It is not a de Polignac number, because 77481037 - 2¹⁵ = 77448269 is a prime.

It is a super-2 number, since 2×77481037² = 12006622189190738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77480987 and 77481005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77481017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38740518 + 38740519.

It is an arithmetic number, because the mean of its divisors is an integer number (38740519).

Almost surely, 2^77481037 is an apocalyptic number.

It is an amenable number.

77481037 is a deficient number, since it is larger than the sum of its proper divisors (1).

77481037 is an equidigital number, since it uses as much as digits as its factorization.

77481037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 77481037 is about 8802.3313389124. The cubic root of 77481037 is about 426.3161725940.

The spelling of 77481037 in words is "seventy-seven million, four hundred eighty-one thousand, thirty-seven".