212834739 has 16 divisors (see below), whose sum is σ = 306712224. Its totient is φ = 130502400.

The previous prime is 212834723. The next prime is 212834749. The reversal of 212834739 is 937438212.

It is not a de Polignac number, because 212834739 - 2⁴ = 212834723 is a prime.

It is a super-2 number, since 2×212834739² = 90597252250396242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 212834697 and 212834706.

It is not an unprimeable number, because it can be changed into a prime (212834719) 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 15 ways as a sum of consecutive naturals, for example, 1249 + ... + 20669.

It is an arithmetic number, because the mean of its divisors is an integer number (19169514).

Almost surely, 2^212834739 is an apocalyptic number.

212834739 is a deficient number, since it is larger than the sum of its proper divisors (93877485).

212834739 is a wasteful number, since it uses less digits than its factorization.

212834739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19718.

The product of its digits is 72576, while the sum is 39.

The square root of 212834739 is about 14588.8566721316. The cubic root of 212834739 is about 597.0547691252.

The spelling of 212834739 in words is "two hundred twelve million, eight hundred thirty-four thousand, seven hundred thirty-nine".