16812139 has 2 divisors, whose sum is σ = 16812140. Its totient is φ = 16812138.

The previous prime is 16812127. The next prime is 16812151. The reversal of 16812139 is 93121861.

It is a balanced prime because it is at equal distance from previous prime (16812127) and next prime (16812151).

It is a cyclic number.

It is not a de Polignac number, because 16812139 - 2¹³ = 16803947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16812139.

It is not a weakly prime, because it can be changed into another prime (16812239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8406069 + 8406070.

It is an arithmetic number, because the mean of its divisors is an integer number (8406070).

Almost surely, 2^16812139 is an apocalyptic number.

16812139 is a deficient number, since it is larger than the sum of its proper divisors (1).

16812139 is an equidigital number, since it uses as much as digits as its factorization.

16812139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 31.

The square root of 16812139 is about 4100.2608453609. The cubic root of 16812139 is about 256.1775044576.

The spelling of 16812139 in words is "sixteen million, eight hundred twelve thousand, one hundred thirty-nine".