39797973 has 10 divisors (see below), whose sum is σ = 59451414. Its totient is φ = 26531928.

The previous prime is 39797963. The next prime is 39797993. The reversal of 39797973 is 37979793.

It can be written as a sum of positive squares in only one way, i.e., 26967249 + 12830724 = 5193^2 + 3582^2 .

It is not a de Polignac number, because 39797973 - 2⁵ = 39797941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39797963) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 245586 + ... + 245747.

Almost surely, 2^39797973 is an apocalyptic number.

It is an amenable number.

39797973 is a deficient number, since it is larger than the sum of its proper divisors (19653441).

39797973 is an equidigital number, since it uses as much as digits as its factorization.

39797973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491345 (or 491336 counting only the distinct ones).

The product of its digits is 2250423, while the sum is 54.

The square root of 39797973 is about 6308.5634656394. The cubic root of 39797973 is about 341.4184484148.

The spelling of 39797973 in words is "thirty-nine million, seven hundred ninety-seven thousand, nine hundred seventy-three".