2139399 has 32 divisors (see below), whose sum is σ = 3456000. Its totient is φ = 1302912.

The previous prime is 2139383. The next prime is 2139407. The reversal of 2139399 is 9939312.

It is not a de Polignac number, because 2139399 - 2⁴ = 2139383 is a prime.

It is an Ulam number.

2139399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27042 + ... + 27120.

It is an arithmetic number, because the mean of its divisors is an integer number (108000).

2^2139399 is an apocalyptic number.

2139399 is a deficient number, since it is larger than the sum of its proper divisors (1316601).

2139399 is a wasteful number, since it uses less digits than its factorization.

2139399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 158 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 2139399 is about 1462.6684518373. The cubic root of 2139399 is about 128.8538095125.

The spelling of 2139399 in words is "two million, one hundred thirty-nine thousand, three hundred ninety-nine".