1372204217 has 2 divisors, whose sum is σ = 1372204218. Its totient is φ = 1372204216.

The previous prime is 1372204157. The next prime is 1372204271. The reversal of 1372204217 is 7124022731.

Together with next prime (1372204271) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1292833936 + 79370281 = 35956^2 + 8909^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372204217 - 2⁸ = 1372203961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1372204217.

It is not a weakly prime, because it can be changed into another prime (1372204297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686102108 + 686102109.

It is an arithmetic number, because the mean of its divisors is an integer number (686102109).

Almost surely, 2^1372204217 is an apocalyptic number.

It is an amenable number.

1372204217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372204217 is an equidigital number, since it uses as much as digits as its factorization.

1372204217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 1372204217 is about 37043.2749227171. The cubic root of 1372204217 is about 1111.2358653230.

Adding to 1372204217 its reverse (7124022731), we get a palindrome (8496226948).

The spelling of 1372204217 in words is "one billion, three hundred seventy-two million, two hundred four thousand, two hundred seventeen".