7940437 has 2 divisors, whose sum is σ = 7940438. Its totient is φ = 7940436.

The previous prime is 7940419. The next prime is 7940447. The reversal of 7940437 is 7340497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5503716 + 2436721 = 2346^2 + 1561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7940437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7940417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3970218 + 3970219.

It is an arithmetic number, because the mean of its divisors is an integer number (3970219).

Almost surely, 2^7940437 is an apocalyptic number.

It is an amenable number.

7940437 is a deficient number, since it is larger than the sum of its proper divisors (1).

7940437 is an equidigital number, since it uses as much as digits as its factorization.

7940437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 7940437 is about 2817.8781024026. The cubic root of 7940437 is about 199.5024046879.

The spelling of 7940437 in words is "seven million, nine hundred forty thousand, four hundred thirty-seven".