77749027 has 2 divisors, whose sum is σ = 77749028. Its totient is φ = 77749026.

The previous prime is 77748977. The next prime is 77749037. The reversal of 77749027 is 72094777.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77749027 is a prime.

It is a super-2 number, since 2×77749027² = 12089822398893458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77749037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38874513 + 38874514.

It is an arithmetic number, because the mean of its divisors is an integer number (38874514).

Almost surely, 2^77749027 is an apocalyptic number.

77749027 is a deficient number, since it is larger than the sum of its proper divisors (1).

77749027 is an equidigital number, since it uses as much as digits as its factorization.

77749027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172872, while the sum is 43.

The square root of 77749027 is about 8817.5408703334. The cubic root of 77749027 is about 426.8071185418.

The spelling of 77749027 in words is "seventy-seven million, seven hundred forty-nine thousand, twenty-seven".