399948753 has 4 divisors (see below), whose sum is σ = 533265008. Its totient is φ = 266632500.

The previous prime is 399948743. The next prime is 399948761. The reversal of 399948753 is 357849993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 357849993 = 3 ⋅119283331.

It is not a de Polignac number, because 399948753 - 2⁵ = 399948721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399948693 and 399948702.

It is not an unprimeable number, because it can be changed into a prime (399948713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66658123 + ... + 66658128.

It is an arithmetic number, because the mean of its divisors is an integer number (133316252).

Almost surely, 2^399948753 is an apocalyptic number.

It is an amenable number.

399948753 is a deficient number, since it is larger than the sum of its proper divisors (133316255).

399948753 is a wasteful number, since it uses less digits than its factorization.

399948753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133316254.

The product of its digits is 7348320, while the sum is 57.

The square root of 399948753 is about 19998.7187839621. The cubic root of 399948753 is about 736.7748324572.

The spelling of 399948753 in words is "three hundred ninety-nine million, nine hundred forty-eight thousand, seven hundred fifty-three".