2947457899 has 4 divisors (see below), whose sum is σ = 2951447080. Its totient is φ = 2943468720.

The previous prime is 2947457881. The next prime is 2947457911. The reversal of 2947457899 is 9987547492.

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-2947457899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2947457899.

It is not an unprimeable number, because it can be changed into a prime (2947457879) 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, 1993482 + ... + 1994959.

It is an arithmetic number, because the mean of its divisors is an integer number (737861770).

Almost surely, 2^2947457899 is an apocalyptic number.

2947457899 is a deficient number, since it is larger than the sum of its proper divisors (3989181).

2947457899 is an equidigital number, since it uses as much as digits as its factorization.

2947457899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989180.

The product of its digits is 45722880, while the sum is 64.

The square root of 2947457899 is about 54290.4954757276. The cubic root of 2947457899 is about 1433.7800619009.

The spelling of 2947457899 in words is "two billion, nine hundred forty-seven million, four hundred fifty-seven thousand, eight hundred ninety-nine".