399246901953 has 4 divisors (see below), whose sum is σ = 532329202608. Its totient is φ = 266164601300.

The previous prime is 399246901877. The next prime is 399246901967. The reversal of 399246901953 is 359109642993.

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.

It is a cyclic number.

It is not a de Polignac number, because 399246901953 - 2¹⁰ = 399246900929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399246901973) 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, 66541150323 + ... + 66541150328.

It is an arithmetic number, because the mean of its divisors is an integer number (133082300652).

Almost surely, 2^399246901953 is an apocalyptic number.

It is an amenable number.

399246901953 is a deficient number, since it is larger than the sum of its proper divisors (133082300655).

399246901953 is a wasteful number, since it uses less digits than its factorization.

399246901953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133082300654.

The product of its (nonzero) digits is 14171760, while the sum is 60.

The spelling of 399246901953 in words is "three hundred ninety-nine billion, two hundred forty-six million, nine hundred one thousand, nine hundred fifty-three".