1398412189 has 2 divisors, whose sum is σ = 1398412190. Its totient is φ = 1398412188.

The previous prime is 1398412157. The next prime is 1398412193. The reversal of 1398412189 is 9812148931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1023680025 + 374732164 = 31995^2 + 19358^2 .

It is a cyclic number.

It is not a de Polignac number, because 1398412189 - 2⁵ = 1398412157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1398412199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699206094 + 699206095.

It is an arithmetic number, because the mean of its divisors is an integer number (699206095).

Almost surely, 2^1398412189 is an apocalyptic number.

It is an amenable number.

1398412189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398412189 is an equidigital number, since it uses as much as digits as its factorization.

1398412189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 46.

The square root of 1398412189 is about 37395.3498312290. The cubic root of 1398412189 is about 1118.2658614744.

The spelling of 1398412189 in words is "one billion, three hundred ninety-eight million, four hundred twelve thousand, one hundred eighty-nine".