2139528497 has 8 divisors (see below), whose sum is σ = 2252667360. Its totient is φ = 2026442880.

The previous prime is 2139528493. The next prime is 2139528499. The reversal of 2139528497 is 7948259312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2139528497 - 2² = 2139528493 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2139528491) 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, 89678 + ... + 111000.

It is an arithmetic number, because the mean of its divisors is an integer number (281583420).

Almost surely, 2^2139528497 is an apocalyptic number.

It is an amenable number.

2139528497 is a deficient number, since it is larger than the sum of its proper divisors (113138863).

2139528497 is a wasteful number, since it uses less digits than its factorization.

2139528497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26623.

The product of its digits is 1088640, while the sum is 50.

The square root of 2139528497 is about 46255.0375310625. The cubic root of 2139528497 is about 1288.5640928392.

The spelling of 2139528497 in words is "two billion, one hundred thirty-nine million, five hundred twenty-eight thousand, four hundred ninety-seven".