2047156939 has 4 divisors (see below), whose sum is σ = 2047794160. Its totient is φ = 2046519720.

The previous prime is 2047156897. The next prime is 2047156961. The reversal of 2047156939 is 9396517402.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2047156939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2047156999) 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, 313767 + ... + 320224.

It is an arithmetic number, because the mean of its divisors is an integer number (511948540).

Almost surely, 2^2047156939 is an apocalyptic number.

2047156939 is a deficient number, since it is larger than the sum of its proper divisors (637221).

2047156939 is an equidigital number, since it uses as much as digits as its factorization.

2047156939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637220.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 2047156939 is about 45245.5184410567. The cubic root of 2047156939 is about 1269.7465629815.

The spelling of 2047156939 in words is "two billion, forty-seven million, one hundred fifty-six thousand, nine hundred thirty-nine".