2947997493 has 24 divisors (see below), whose sum is σ = 4868259968. Its totient is φ = 1683973152.

The previous prime is 2947997491. The next prime is 2947997501. The reversal of 2947997493 is 3947997492.

2947997493 is a `hidden beast` number, since 2 + 9 + 479 + 9 + 74 + 93 = 666.

It is not a de Polignac number, because 2947997493 - 2¹ = 2947997491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 2947997493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2947997491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220755 + ... + 233727.

Almost surely, 2^2947997493 is an apocalyptic number.

It is an amenable number.

2947997493 is a deficient number, since it is larger than the sum of its proper divisors (1920262475).

2947997493 is a wasteful number, since it uses less digits than its factorization.

2947997493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16593 (or 16590 counting only the distinct ones).

The product of its digits is 30862944, while the sum is 63.

The square root of 2947997493 is about 54295.4647553550. The cubic root of 2947997493 is about 1433.8675510683.

Subtracting 2947997493 from its reverse (3947997492), we obtain a palindrome (999999999).

The spelling of 2947997493 in words is "two billion, nine hundred forty-seven million, nine hundred ninety-seven thousand, four hundred ninety-three".