7642474309 has 2 divisors, whose sum is σ = 7642474310. Its totient is φ = 7642474308.

The previous prime is 7642474289. The next prime is 7642474319. The reversal of 7642474309 is 9034742467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5306685409 + 2335788900 = 72847^2 + 48330^2 .

It is a cyclic number.

It is not a de Polignac number, because 7642474309 - 2¹¹ = 7642472261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7642474319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3821237154 + 3821237155.

It is an arithmetic number, because the mean of its divisors is an integer number (3821237155).

Almost surely, 2^7642474309 is an apocalyptic number.

It is an amenable number.

7642474309 is a deficient number, since it is larger than the sum of its proper divisors (1).

7642474309 is an equidigital number, since it uses as much as digits as its factorization.

7642474309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 46.

The square root of 7642474309 is about 87421.2463249066. The cubic root of 7642474309 is about 1969.7509978427.

The spelling of 7642474309 in words is "seven billion, six hundred forty-two million, four hundred seventy-four thousand, three hundred nine".