3128472497 has 4 divisors (see below), whose sum is σ = 3130923636. Its totient is φ = 3126021360.

The previous prime is 3128472449. The next prime is 3128472517. The reversal of 3128472497 is 7942748213.

It is a happy number.

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 2383782976 + 744689521 = 48824^2 + 27289^2 .

It is a cyclic number.

It is not a de Polignac number, because 3128472497 - 2¹⁰ = 3128471473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3128472427) 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, 1223654 + ... + 1226207.

It is an arithmetic number, because the mean of its divisors is an integer number (782730909).

Almost surely, 2^3128472497 is an apocalyptic number.

It is an amenable number.

3128472497 is a deficient number, since it is larger than the sum of its proper divisors (2451139).

3128472497 is a wasteful number, since it uses less digits than its factorization.

3128472497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451138.

The product of its digits is 677376, while the sum is 47.

The square root of 3128472497 is about 55932.7497714890. The cubic root of 3128472497 is about 1462.5501962658.

The spelling of 3128472497 in words is "three billion, one hundred twenty-eight million, four hundred seventy-two thousand, four hundred ninety-seven".