39973589 has 2 divisors, whose sum is σ = 39973590. Its totient is φ = 39973588.

The previous prime is 39973567. The next prime is 39973597. The reversal of 39973589 is 98537993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38651089 + 1322500 = 6217^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 39973589 - 2¹² = 39969493 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 39973589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39973189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19986794 + 19986795.

It is an arithmetic number, because the mean of its divisors is an integer number (19986795).

Almost surely, 2^39973589 is an apocalyptic number.

It is an amenable number.

39973589 is a deficient number, since it is larger than the sum of its proper divisors (1).

39973589 is an equidigital number, since it uses as much as digits as its factorization.

39973589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 53.

The square root of 39973589 is about 6322.4670026818. The cubic root of 39973589 is about 341.9199024717.

The spelling of 39973589 in words is "thirty-nine million, nine hundred seventy-three thousand, five hundred eighty-nine".