212829139 has 2 divisors, whose sum is σ = 212829140. Its totient is φ = 212829138.

The previous prime is 212829131. The next prime is 212829157. The reversal of 212829139 is 931928212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212829139 - 2³ = 212829131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212829098 and 212829107.

It is not a weakly prime, because it can be changed into another prime (212829131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106414569 + 106414570.

It is an arithmetic number, because the mean of its divisors is an integer number (106414570).

Almost surely, 2^212829139 is an apocalyptic number.

212829139 is a deficient number, since it is larger than the sum of its proper divisors (1).

212829139 is an equidigital number, since it uses as much as digits as its factorization.

212829139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 212829139 is about 14588.6647435603. The cubic root of 212829139 is about 597.0495326116.

The spelling of 212829139 in words is "two hundred twelve million, eight hundred twenty-nine thousand, one hundred thirty-nine".