7212906139 has 2 divisors, whose sum is σ = 7212906140. Its totient is φ = 7212906138.

The previous prime is 7212906119. The next prime is 7212906161. The reversal of 7212906139 is 9316092127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7212906139 - 2¹¹ = 7212904091 is a prime.

It is not a weakly prime, because it can be changed into another prime (7212906119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3606453069 + 3606453070.

It is an arithmetic number, because the mean of its divisors is an integer number (3606453070).

Almost surely, 2^7212906139 is an apocalyptic number.

7212906139 is a deficient number, since it is larger than the sum of its proper divisors (1).

7212906139 is an equidigital number, since it uses as much as digits as its factorization.

7212906139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 7212906139 is about 84928.8298459363. The cubic root of 7212906139 is about 1932.1318527514.

The spelling of 7212906139 in words is "seven billion, two hundred twelve million, nine hundred six thousand, one hundred thirty-nine".