39490973 has 6 divisors (see below), whose sum is σ = 40152762. Its totient is φ = 38839920.

The previous prime is 39490961. The next prime is 39490999. The reversal of 39490973 is 37909493.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1026169 + 38464804 = 1013^2 + 6202^2 .

It is not a de Polignac number, because 39490973 - 2¹⁰ = 39489949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39490673) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1586 + ... + 9027.

It is an arithmetic number, because the mean of its divisors is an integer number (6692127).

Almost surely, 2^39490973 is an apocalyptic number.

It is an amenable number.

39490973 is a deficient number, since it is larger than the sum of its proper divisors (661789).

39490973 is an equidigital number, since it uses as much as digits as its factorization.

39490973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10735 (or 10674 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 39490973 is about 6284.1843543932. The cubic root of 39490973 is about 340.5382851733.

The spelling of 39490973 in words is "thirty-nine million, four hundred ninety thousand, nine hundred seventy-three".