1406423189 has 2 divisors, whose sum is σ = 1406423190. Its totient is φ = 1406423188.

The previous prime is 1406423177. The next prime is 1406423203. The reversal of 1406423189 is 9813246041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 959946289 + 446476900 = 30983^2 + 21130^2 .

It is an emirp because it is prime and its reverse (9813246041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1406423189 - 2¹⁶ = 1406357653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1406423089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703211594 + 703211595.

It is an arithmetic number, because the mean of its divisors is an integer number (703211595).

Almost surely, 2^1406423189 is an apocalyptic number.

It is an amenable number.

1406423189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406423189 is an equidigital number, since it uses as much as digits as its factorization.

1406423189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 1406423189 is about 37502.3091155731. The cubic root of 1406423189 is about 1120.3971776406.

The spelling of 1406423189 in words is "one billion, four hundred six million, four hundred twenty-three thousand, one hundred eighty-nine".