7722139 has 2 divisors, whose sum is σ = 7722140. Its totient is φ = 7722138.

The previous prime is 7722119. The next prime is 7722163. The reversal of 7722139 is 9312277.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7722139 - 2⁵ = 7722107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7722139.

It is not a weakly prime, because it can be changed into another prime (7722119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3861069 + 3861070.

It is an arithmetic number, because the mean of its divisors is an integer number (3861070).

Almost surely, 2^7722139 is an apocalyptic number.

7722139 is a deficient number, since it is larger than the sum of its proper divisors (1).

7722139 is an equidigital number, since it uses as much as digits as its factorization.

7722139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 31.

The square root of 7722139 is about 2778.8736927036. The cubic root of 7722139 is about 197.6571541987.

The spelling of 7722139 in words is "seven million, seven hundred twenty-two thousand, one hundred thirty-nine".