7197139 has 2 divisors, whose sum is σ = 7197140. Its totient is φ = 7197138.

The previous prime is 7197131. The next prime is 7197209. The reversal of 7197139 is 9317917.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7197139 - 2³ = 7197131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7197098 and 7197107.

It is not a weakly prime, because it can be changed into another prime (7197131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3598569 + 3598570.

It is an arithmetic number, because the mean of its divisors is an integer number (3598570).

Almost surely, 2^7197139 is an apocalyptic number.

7197139 is a deficient number, since it is larger than the sum of its proper divisors (1).

7197139 is an equidigital number, since it uses as much as digits as its factorization.

7197139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11907, while the sum is 37.

The square root of 7197139 is about 2682.7484041557. The cubic root of 7197139 is about 193.0722970037.

It can be divided in two parts, 71971 and 39, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 7197139 in words is "seven million, one hundred ninety-seven thousand, one hundred thirty-nine".