77739007 has 2 divisors, whose sum is σ = 77739008. Its totient is φ = 77739006.

The previous prime is 77738981. The next prime is 77739023. The reversal of 77739007 is 70093777.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77739007 - 2¹⁹ = 77214719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77739037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38869503 + 38869504.

It is an arithmetic number, because the mean of its divisors is an integer number (38869504).

Almost surely, 2^77739007 is an apocalyptic number.

77739007 is a deficient number, since it is larger than the sum of its proper divisors (1).

77739007 is an equidigital number, since it uses as much as digits as its factorization.

77739007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64827, while the sum is 40.

The square root of 77739007 is about 8816.9726663975. The cubic root of 77739007 is about 426.7887826593.

The spelling of 77739007 in words is "seventy-seven million, seven hundred thirty-nine thousand, seven".