39172493 has 2 divisors, whose sum is σ = 39172494. Its totient is φ = 39172492.

The previous prime is 39172489. The next prime is 39172513. The reversal of 39172493 is 39427193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34833604 + 4338889 = 5902^2 + 2083^2 .

It is a cyclic number.

It is not a de Polignac number, because 39172493 - 2² = 39172489 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39172453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19586246 + 19586247.

It is an arithmetic number, because the mean of its divisors is an integer number (19586247).

Almost surely, 2^39172493 is an apocalyptic number.

It is an amenable number.

39172493 is a deficient number, since it is larger than the sum of its proper divisors (1).

39172493 is an equidigital number, since it uses as much as digits as its factorization.

39172493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 38.

The square root of 39172493 is about 6258.7932542943. The cubic root of 39172493 is about 339.6203750210.

The spelling of 39172493 in words is "thirty-nine million, one hundred seventy-two thousand, four hundred ninety-three".