74649709 has 2 divisors, whose sum is σ = 74649710. Its totient is φ = 74649708.

The previous prime is 74649671. The next prime is 74649713. The reversal of 74649709 is 90794647.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72080100 + 2569609 = 8490^2 + 1603^2 .

It is a cyclic number.

It is not a de Polignac number, because 74649709 - 2²³ = 66261101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74649739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37324854 + 37324855.

It is an arithmetic number, because the mean of its divisors is an integer number (37324855).

Almost surely, 2^74649709 is an apocalyptic number.

It is an amenable number.

74649709 is a deficient number, since it is larger than the sum of its proper divisors (1).

74649709 is an equidigital number, since it uses as much as digits as its factorization.

74649709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 74649709 is about 8640.0063078681. The cubic root of 74649709 is about 421.0587592395.

The spelling of 74649709 in words is "seventy-four million, six hundred forty-nine thousand, seven hundred nine".