39440537 has 2 divisors, whose sum is σ = 39440538. Its totient is φ = 39440536.

The previous prime is 39440509. The next prime is 39440539. The reversal of 39440537 is 73504493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28344976 + 11095561 = 5324^2 + 3331^2 .

It is a cyclic number.

It is not a de Polignac number, because 39440537 - 2⁸ = 39440281 is a prime.

Together with 39440539, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 39440497 and 39440506.

It is not a weakly prime, because it can be changed into another prime (39440539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19720268 + 19720269.

It is an arithmetic number, because the mean of its divisors is an integer number (19720269).

Almost surely, 2^39440537 is an apocalyptic number.

It is an amenable number.

39440537 is a deficient number, since it is larger than the sum of its proper divisors (1).

39440537 is an equidigital number, since it uses as much as digits as its factorization.

39440537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 39440537 is about 6280.1701410073. The cubic root of 39440537 is about 340.3932502897.

The spelling of 39440537 in words is "thirty-nine million, four hundred forty thousand, five hundred thirty-seven".