213999929 has 16 divisors (see below), whose sum is σ = 252982464. Its totient is φ = 178459200.

The previous prime is 213999917. The next prime is 213999959. The reversal of 213999929 is 929999312.

It is a cyclic number.

It is not a de Polignac number, because 213999929 - 2⁸ = 213999673 is a prime.

It is a super-2 number, since 2×213999929² = 91591939224010082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213999959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18719 + ... + 27899.

It is an arithmetic number, because the mean of its divisors is an integer number (15811404).

Almost surely, 2^213999929 is an apocalyptic number.

It is an amenable number.

213999929 is a deficient number, since it is larger than the sum of its proper divisors (38982535).

213999929 is a wasteful number, since it uses less digits than its factorization.

213999929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9368.

The product of its digits is 708588, while the sum is 53.

The square root of 213999929 is about 14628.7364115976. The cubic root of 213999929 is about 598.1423368224.

It can be divided in two parts, 2 and 13999929, that added together give a palindrome (13999931).

The spelling of 213999929 in words is "two hundred thirteen million, nine hundred ninety-nine thousand, nine hundred twenty-nine".