7138237 has 2 divisors, whose sum is σ = 7138238. Its totient is φ = 7138236.

The previous prime is 7138217. The next prime is 7138273. The reversal of 7138237 is 7328317.

Together with next prime (7138273) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6205081 + 933156 = 2491^2 + 966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7138237 is a prime.

It is a Chen prime.

7138237 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7138199 and 7138208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7138207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3569118 + 3569119.

It is an arithmetic number, because the mean of its divisors is an integer number (3569119).

Almost surely, 2^7138237 is an apocalyptic number.

It is an amenable number.

7138237 is a deficient number, since it is larger than the sum of its proper divisors (1).

7138237 is an equidigital number, since it uses as much as digits as its factorization.

7138237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 31.

The square root of 7138237 is about 2671.7479297269. The cubic root of 7138237 is about 192.5441468434.

The spelling of 7138237 in words is "seven million, one hundred thirty-eight thousand, two hundred thirty-seven".