2391437 has 2 divisors, whose sum is σ = 2391438. Its totient is φ = 2391436.

The previous prime is 2391401. The next prime is 2391439. The reversal of 2391437 is 7341932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1297321 + 1094116 = 1139^2 + 1046^2 .

It is a cyclic number.

It is not a de Polignac number, because 2391437 - 2¹⁶ = 2325901 is a prime.

Together with 2391439, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2391439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195718 + 1195719.

It is an arithmetic number, because the mean of its divisors is an integer number (1195719).

2^2391437 is an apocalyptic number.

It is an amenable number.

2391437 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391437 is an equidigital number, since it uses as much as digits as its factorization.

2391437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 29.

The square root of 2391437 is about 1546.4271725497. The cubic root of 2391437 is about 133.7271681993.

The spelling of 2391437 in words is "two million, three hundred ninety-one thousand, four hundred thirty-seven".