2139491454 has 16 divisors (see below), whose sum is σ = 4283560848. Its totient is φ = 712400832.

The previous prime is 2139491437. The next prime is 2139491467. The reversal of 2139491454 is 4541949312.

It is a super-3 number, since 3×2139491454³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184657 + ... + 195900.

It is an arithmetic number, because the mean of its divisors is an integer number (267722553).

Almost surely, 2^2139491454 is an apocalyptic number.

2139491454 is an abundant number, since it is smaller than the sum of its proper divisors (2144069394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2139491454 is a wasteful number, since it uses less digits than its factorization.

2139491454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381499.

The product of its digits is 155520, while the sum is 42.

The square root of 2139491454 is about 46254.6371080781. The cubic root of 2139491454 is about 1288.5566562232.

The spelling of 2139491454 in words is "two billion, one hundred thirty-nine million, four hundred ninety-one thousand, four hundred fifty-four".