2139406371 has 8 divisors (see below), whose sum is σ = 3169490960. Its totient is φ = 1426270896.

The previous prime is 2139406369. The next prime is 2139406411. The reversal of 2139406371 is 1736049312.

2139406371 is a `hidden beast` number, since 2 + 13 + 9 + 4 + 0 + 637 + 1 = 666.

It is not a de Polignac number, because 2139406371 - 2¹ = 2139406369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139406331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39618610 + ... + 39618663.

It is an arithmetic number, because the mean of its divisors is an integer number (396186370).

Almost surely, 2^2139406371 is an apocalyptic number.

2139406371 is a deficient number, since it is larger than the sum of its proper divisors (1030084589).

2139406371 is an equidigital number, since it uses as much as digits as its factorization.

2139406371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79237282 (or 79237276 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 2139406371 is about 46253.7173749311. The cubic root of 2139406371 is about 1288.5395749492.

The spelling of 2139406371 in words is "two billion, one hundred thirty-nine million, four hundred six thousand, three hundred seventy-one".