2152759397 has 4 divisors (see below), whose sum is σ = 2153643756. Its totient is φ = 2151875040.

The previous prime is 2152759391. The next prime is 2152759409. The reversal of 2152759397 is 7939572512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1380419716 + 772339681 = 37154^2 + 27791^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152759397 - 2⁶ = 2152759333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152759391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438518 + ... + 443399.

It is an arithmetic number, because the mean of its divisors is an integer number (538410939).

Almost surely, 2^2152759397 is an apocalyptic number.

It is an amenable number.

2152759397 is a deficient number, since it is larger than the sum of its proper divisors (884359).

2152759397 is an equidigital number, since it uses as much as digits as its factorization.

2152759397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884358.

The product of its digits is 1190700, while the sum is 50.

The square root of 2152759397 is about 46397.8382793854. The cubic root of 2152759397 is about 1291.2148076088.

The spelling of 2152759397 in words is "two billion, one hundred fifty-two million, seven hundred fifty-nine thousand, three hundred ninety-seven".