77242007 has 2 divisors, whose sum is σ = 77242008. Its totient is φ = 77242006.

The previous prime is 77241961. The next prime is 77242019. The reversal of 77242007 is 70024277.

It is a strong prime.

It is an emirp because it is prime and its reverse (70024277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77242007 - 2²⁶ = 10133143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77242037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38621003 + 38621004.

It is an arithmetic number, because the mean of its divisors is an integer number (38621004).

Almost surely, 2^77242007 is an apocalyptic number.

77242007 is a deficient number, since it is larger than the sum of its proper divisors (1).

77242007 is an equidigital number, since it uses as much as digits as its factorization.

77242007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 77242007 is about 8788.7431979777. The cubic root of 77242007 is about 425.8773240332.

The spelling of 77242007 in words is "seventy-seven million, two hundred forty-two thousand, seven".