399342453501 has 4 divisors (see below), whose sum is σ = 532456604672. Its totient is φ = 266228302332.

The previous prime is 399342453467. The next prime is 399342453527. The reversal of 399342453501 is 105354243993.

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: 105354243993 = 3 ⋅35118081331.

It is not a de Polignac number, because 399342453501 - 2¹⁵ = 399342420733 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 (399342453551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66557075581 + ... + 66557075586.

It is an arithmetic number, because the mean of its divisors is an integer number (133114151168).

Almost surely, 2^399342453501 is an apocalyptic number.

It is an amenable number.

399342453501 is a deficient number, since it is larger than the sum of its proper divisors (133114151171).

399342453501 is a wasteful number, since it uses less digits than its factorization.

399342453501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133114151170.

The product of its (nonzero) digits is 1749600, while the sum is 48.

The spelling of 399342453501 in words is "three hundred ninety-nine billion, three hundred forty-two million, four hundred fifty-three thousand, five hundred one".