7498999957 has 4 divisors (see below), whose sum is σ = 7500709836. Its totient is φ = 7497290080.

The previous prime is 7498999943. The next prime is 7498999961. The reversal of 7498999957 is 7599998947.

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 5090251716 + 2408748241 = 71346^2 + 49079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7498999957 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 (7498999987) 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, 848344 + ... + 857137.

It is an arithmetic number, because the mean of its divisors is an integer number (1875177459).

Almost surely, 2^7498999957 is an apocalyptic number.

It is an amenable number.

7498999957 is a deficient number, since it is larger than the sum of its proper divisors (1709879).

7498999957 is a wasteful number, since it uses less digits than its factorization.

7498999957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709878.

The product of its digits is 462944160, while the sum is 76.

The square root of 7498999957 is about 86596.7664350119. The cubic root of 7498999957 is about 1957.3468159177.

The spelling of 7498999957 in words is "seven billion, four hundred ninety-eight million, nine hundred ninety-nine thousand, nine hundred fifty-seven".