39973157 has 8 divisors (see below), whose sum is σ = 45738432. Its totient is φ = 34221600.

The previous prime is 39973151. The next prime is 39973159. The reversal of 39973157 is 75137993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39973157 - 2²⁰ = 38924581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39973151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3857 + ... + 9737.

It is an arithmetic number, because the mean of its divisors is an integer number (5717304).

Almost surely, 2^39973157 is an apocalyptic number.

It is an amenable number.

39973157 is a deficient number, since it is larger than the sum of its proper divisors (5765275).

39973157 is an equidigital number, since it uses as much as digits as its factorization.

39973157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6859.

The product of its digits is 178605, while the sum is 44.

The square root of 39973157 is about 6322.4328387101. The cubic root of 39973157 is about 341.9186707423.

The spelling of 39973157 in words is "thirty-nine million, nine hundred seventy-three thousand, one hundred fifty-seven".