1509139797 has 16 divisors (see below), whose sum is σ = 2195770368. Its totient is φ = 914356080.

The previous prime is 1509139777. The next prime is 1509139813. The reversal of 1509139797 is 7979319051.

It is not a de Polignac number, because 1509139797 - 2³⁰ = 435397973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1509139727) 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, 185538 + ... + 193500.

It is an arithmetic number, because the mean of its divisors is an integer number (137235648).

Almost surely, 2^1509139797 is an apocalyptic number.

It is an amenable number.

1509139797 is a deficient number, since it is larger than the sum of its proper divisors (686630571).

1509139797 is a wasteful number, since it uses less digits than its factorization.

1509139797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13720.

The product of its (nonzero) digits is 535815, while the sum is 51.

The square root of 1509139797 is about 38847.6485388756. The cubic root of 1509139797 is about 1147.0345264431.

The spelling of 1509139797 in words is "one billion, five hundred nine million, one hundred thirty-nine thousand, seven hundred ninety-seven".