32172493 has 2 divisors, whose sum is σ = 32172494. Its totient is φ = 32172492.

The previous prime is 32172479. The next prime is 32172541. The reversal of 32172493 is 39427123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20187049 + 11985444 = 4493^2 + 3462^2 .

It is an emirp because it is prime and its reverse (39427123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32172493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32172403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16086246 + 16086247.

It is an arithmetic number, because the mean of its divisors is an integer number (16086247).

Almost surely, 2^32172493 is an apocalyptic number.

It is an amenable number.

32172493 is a deficient number, since it is larger than the sum of its proper divisors (1).

32172493 is an equidigital number, since it uses as much as digits as its factorization.

32172493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 32172493 is about 5672.0801298994. The cubic root of 32172493 is about 318.0496375715.

The spelling of 32172493 in words is "thirty-two million, one hundred seventy-two thousand, four hundred ninety-three".