2309947 has 8 divisors (see below), whose sum is σ = 2394000. Its totient is φ = 2227104.

The previous prime is 2309933. The next prime is 2309969. The reversal of 2309947 is 7499032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2309947 - 2¹⁵ = 2277179 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2309927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5304 + ... + 5722.

It is an arithmetic number, because the mean of its divisors is an integer number (299250).

2^2309947 is an apocalyptic number.

2309947 is a deficient number, since it is larger than the sum of its proper divisors (84053).

2309947 is a wasteful number, since it uses less digits than its factorization.

2309947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 2309947 is about 1519.8509795371. The cubic root of 2309947 is about 132.1906298312.

The spelling of 2309947 in words is "two million, three hundred nine thousand, nine hundred forty-seven".