39953197 has 4 divisors (see below), whose sum is σ = 40002336. Its totient is φ = 39904060.

The previous prime is 39953183. The next prime is 39953227. The reversal of 39953197 is 79135993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39953197 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 (39953167) 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, 23329 + ... + 24982.

It is an arithmetic number, because the mean of its divisors is an integer number (10000584).

Almost surely, 2^39953197 is an apocalyptic number.

It is an amenable number.

39953197 is a deficient number, since it is larger than the sum of its proper divisors (49139).

39953197 is an equidigital number, since it uses as much as digits as its factorization.

39953197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49138.

The product of its digits is 229635, while the sum is 46.

The square root of 39953197 is about 6320.8541353206. The cubic root of 39953197 is about 341.8617506036.

The spelling of 39953197 in words is "thirty-nine million, nine hundred fifty-three thousand, one hundred ninety-seven".