2309649371 has 4 divisors (see below), whose sum is σ = 2309827992. Its totient is φ = 2309470752.

The previous prime is 2309649347. The next prime is 2309649379. The reversal of 2309649371 is 1739469032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2309649371 - 2¹⁴ = 2309632987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2309649379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68261 + ... + 96326.

It is an arithmetic number, because the mean of its divisors is an integer number (577456998).

Almost surely, 2^2309649371 is an apocalyptic number.

2309649371 is a deficient number, since it is larger than the sum of its proper divisors (178621).

2309649371 is a wasteful number, since it uses less digits than its factorization.

2309649371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178620.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 2309649371 is about 48058.8115853898. The cubic root of 2309649371 is about 1321.8495214616.

The spelling of 2309649371 in words is "two billion, three hundred nine million, six hundred forty-nine thousand, three hundred seventy-one".