213420739 has 16 divisors (see below), whose sum is σ = 251426560. Its totient is φ = 177357600.

The previous prime is 213420733. The next prime is 213420743. The reversal of 213420739 is 937024312.

It is not a de Polignac number, because 213420739 - 2¹¹ = 213418691 is a prime.

It is a super-2 number, since 2×213420739² = 91096823670612242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213420739.

It is not an unprimeable number, because it can be changed into a prime (213420733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39289 + ... + 44389.

It is an arithmetic number, because the mean of its divisors is an integer number (15714160).

Almost surely, 2^213420739 is an apocalyptic number.

213420739 is a deficient number, since it is larger than the sum of its proper divisors (38005821).

213420739 is a wasteful number, since it uses less digits than its factorization.

213420739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5290.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 213420739 is about 14608.9266888434. The cubic root of 213420739 is about 597.6022259340.

The spelling of 213420739 in words is "two hundred thirteen million, four hundred twenty thousand, seven hundred thirty-nine".