6403187139 has 16 divisors (see below), whose sum is σ = 9148712832. Its totient is φ = 3969277568.

The previous prime is 6403187117. The next prime is 6403187159. The reversal of 6403187139 is 9317813046.

It is a cyclic number.

It is not a de Polignac number, because 6403187139 - 2⁸ = 6403186883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6403187139.

It is not an unprimeable number, because it can be changed into a prime (6403187159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 752109 + ... + 760574.

It is an arithmetic number, because the mean of its divisors is an integer number (571794552).

Almost surely, 2^6403187139 is an apocalyptic number.

6403187139 is a deficient number, since it is larger than the sum of its proper divisors (2745525693).

6403187139 is a wasteful number, since it uses less digits than its factorization.

6403187139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512786.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 6403187139 is about 80019.9171394222. The cubic root of 6403187139 is about 1856.9436778996.

The spelling of 6403187139 in words is "six billion, four hundred three million, one hundred eighty-seven thousand, one hundred thirty-nine".