372172217 has 2 divisors, whose sum is σ = 372172218. Its totient is φ = 372172216.

The previous prime is 372172183. The next prime is 372172243. The reversal of 372172217 is 712271273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344882041 + 27290176 = 18571^2 + 5224^2 .

It is a cyclic number.

It is not a de Polignac number, because 372172217 - 2⁶ = 372172153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (372102217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186086108 + 186086109.

It is an arithmetic number, because the mean of its divisors is an integer number (186086109).

Almost surely, 2^372172217 is an apocalyptic number.

It is an amenable number.

372172217 is a deficient number, since it is larger than the sum of its proper divisors (1).

372172217 is an equidigital number, since it uses as much as digits as its factorization.

372172217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8232, while the sum is 32.

The square root of 372172217 is about 19291.7655231448. The cubic root of 372172217 is about 719.3076014622.

The spelling of 372172217 in words is "three hundred seventy-two million, one hundred seventy-two thousand, two hundred seventeen".