65391437 has 2 divisors, whose sum is σ = 65391438. Its totient is φ = 65391436.

The previous prime is 65391419. The next prime is 65391449. The reversal of 65391437 is 73419356.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62504836 + 2886601 = 7906^2 + 1699^2 .

It is a cyclic number.

It is not a de Polignac number, because 65391437 - 2⁶ = 65391373 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65391437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65351437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32695718 + 32695719.

It is an arithmetic number, because the mean of its divisors is an integer number (32695719).

Almost surely, 2^65391437 is an apocalyptic number.

It is an amenable number.

65391437 is a deficient number, since it is larger than the sum of its proper divisors (1).

65391437 is an equidigital number, since it uses as much as digits as its factorization.

65391437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 38.

The square root of 65391437 is about 8086.4972021265. The cubic root of 65391437 is about 402.8780692110.

The spelling of 65391437 in words is "sixty-five million, three hundred ninety-one thousand, four hundred thirty-seven".