7137989 has 2 divisors, whose sum is σ = 7137990. Its totient is φ = 7137988.

The previous prime is 7137961. The next prime is 7138009. The reversal of 7137989 is 9897317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4389025 + 2748964 = 2095^2 + 1658^2 .

It is a cyclic number.

It is not a de Polignac number, because 7137989 - 2⁸ = 7137733 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7137589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3568994 + 3568995.

It is an arithmetic number, because the mean of its divisors is an integer number (3568995).

Almost surely, 2^7137989 is an apocalyptic number.

It is an amenable number.

7137989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7137989 is an equidigital number, since it uses as much as digits as its factorization.

7137989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 44.

The square root of 7137989 is about 2671.7015177598. The cubic root of 7137989 is about 192.5419169977.

The spelling of 7137989 in words is "seven million, one hundred thirty-seven thousand, nine hundred eighty-nine".