1138251497 has 2 divisors, whose sum is σ = 1138251498. Its totient is φ = 1138251496.

The previous prime is 1138251493. The next prime is 1138251523. The reversal of 1138251497 is 7941528311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1100846041 + 37405456 = 33179^2 + 6116^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138251497 - 2² = 1138251493 is a prime.

It is not a weakly prime, because it can be changed into another prime (1138251493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569125748 + 569125749.

It is an arithmetic number, because the mean of its divisors is an integer number (569125749).

Almost surely, 2^1138251497 is an apocalyptic number.

It is an amenable number.

1138251497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138251497 is an equidigital number, since it uses as much as digits as its factorization.

1138251497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 1138251497 is about 33737.9830013592. The cubic root of 1138251497 is about 1044.1095707750.

The spelling of 1138251497 in words is "one billion, one hundred thirty-eight million, two hundred fifty-one thousand, four hundred ninety-seven".