399214951 has 4 divisors (see below), whose sum is σ = 399821400. Its totient is φ = 398608504.

The previous prime is 399214943. The next prime is 399214969. The reversal of 399214951 is 159412993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 159412993 = 191 ⋅834623.

It is a cyclic number.

It is not a de Polignac number, because 399214951 - 2³ = 399214943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399214898 and 399214907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399214051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302236 + ... + 303553.

It is an arithmetic number, because the mean of its divisors is an integer number (99955350).

Almost surely, 2^399214951 is an apocalyptic number.

399214951 is a deficient number, since it is larger than the sum of its proper divisors (606449).

399214951 is an equidigital number, since it uses as much as digits as its factorization.

399214951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606448.

The product of its digits is 87480, while the sum is 43.

The square root of 399214951 is about 19980.3641358209. The cubic root of 399214951 is about 736.3239598326.

The spelling of 399214951 in words is "three hundred ninety-nine million, two hundred fourteen thousand, nine hundred fifty-one".