7125631399 has 4 divisors (see below), whose sum is σ = 7130557264. Its totient is φ = 7120705536.

The previous prime is 7125631391. The next prime is 7125631451. The reversal of 7125631399 is 9931365217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9931365217 = 24809 ⋅400313.

It is a cyclic number.

It is not a de Polignac number, because 7125631399 - 2³ = 7125631391 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 (7125631391) 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, 2460762 + ... + 2463655.

It is an arithmetic number, because the mean of its divisors is an integer number (1782639316).

Almost surely, 2^7125631399 is an apocalyptic number.

7125631399 is a deficient number, since it is larger than the sum of its proper divisors (4925865).

7125631399 is a wasteful number, since it uses less digits than its factorization.

7125631399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4925864.

The product of its digits is 306180, while the sum is 46.

The square root of 7125631399 is about 84413.4550827059. The cubic root of 7125631399 is about 1924.3074046557.

The spelling of 7125631399 in words is "seven billion, one hundred twenty-five million, six hundred thirty-one thousand, three hundred ninety-nine".