39970423 has 4 divisors (see below), whose sum is σ = 40258120. Its totient is φ = 39682728.

The previous prime is 39970421. The next prime is 39970453. The reversal of 39970423 is 32407993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39970423 - 2¹ = 39970421 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 (39970421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143640 + ... + 143917.

It is an arithmetic number, because the mean of its divisors is an integer number (10064530).

Almost surely, 2^39970423 is an apocalyptic number.

39970423 is a deficient number, since it is larger than the sum of its proper divisors (287697).

39970423 is a wasteful number, since it uses less digits than its factorization.

39970423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287696.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 39970423 is about 6322.2166207747. The cubic root of 39970423 is about 341.9108752863.

The spelling of 39970423 in words is "thirty-nine million, nine hundred seventy thousand, four hundred twenty-three".