4991908437 has 12 divisors (see below), whose sum is σ = 7590036480. Its totient is φ = 3152784168.

The previous prime is 4991908429. The next prime is 4991908447. The reversal of 4991908437 is 7348091994.

It is not a de Polignac number, because 4991908437 - 2³ = 4991908429 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991908447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14596053 + ... + 14596394.

It is an arithmetic number, because the mean of its divisors is an integer number (632503040).

Almost surely, 2^4991908437 is an apocalyptic number.

It is an amenable number.

4991908437 is a deficient number, since it is larger than the sum of its proper divisors (2598128043).

4991908437 is a wasteful number, since it uses less digits than its factorization.

4991908437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29192472 (or 29192469 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 4991908437 is about 70653.4389608885. The cubic root of 4991908437 is about 1709.0530234313.

The spelling of 4991908437 in words is "four billion, nine hundred ninety-one million, nine hundred eight thousand, four hundred thirty-seven".