1139898493 has 2 divisors, whose sum is σ = 1139898494. Its totient is φ = 1139898492.

The previous prime is 1139898457. The next prime is 1139898497. The reversal of 1139898493 is 3948989311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1138522564 + 1375929 = 33742^2 + 1173^2 .

It is a cyclic number.

It is not a de Polignac number, because 1139898493 - 2²⁵ = 1106344061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1139898497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569949246 + 569949247.

It is an arithmetic number, because the mean of its divisors is an integer number (569949247).

Almost surely, 2^1139898493 is an apocalyptic number.

It is an amenable number.

1139898493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139898493 is an equidigital number, since it uses as much as digits as its factorization.

1139898493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 55.

The square root of 1139898493 is about 33762.3828098670. The cubic root of 1139898493 is about 1044.6129204426.

The spelling of 1139898493 in words is "one billion, one hundred thirty-nine million, eight hundred ninety-eight thousand, four hundred ninety-three".