4937891639 has 4 divisors (see below), whose sum is σ = 4938032400. Its totient is φ = 4937750880.

The previous prime is 4937891617. The next prime is 4937891659. The reversal of 4937891639 is 9361987394.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4937891639 - 2²⁰ = 4936843063 is a prime.

It is a super-2 number, since 2×4937891639² = 48765547677012212642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4937891659) 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, 29294 + ... + 103604.

It is an arithmetic number, because the mean of its divisors is an integer number (1234508100).

Almost surely, 2^4937891639 is an apocalyptic number.

4937891639 is a deficient number, since it is larger than the sum of its proper divisors (140761).

4937891639 is an equidigital number, since it uses as much as digits as its factorization.

4937891639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140760.

The product of its digits is 8817984, while the sum is 59.

The square root of 4937891639 is about 70270.1333355786. The cubic root of 4937891639 is about 1702.8661729208.

The spelling of 4937891639 in words is "four billion, nine hundred thirty-seven million, eight hundred ninety-one thousand, six hundred thirty-nine".