1146138491 has 2 divisors, whose sum is σ = 1146138492. Its totient is φ = 1146138490.

The previous prime is 1146138481. The next prime is 1146138619. The reversal of 1146138491 is 1948316411.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1146138491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1146138481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573069245 + 573069246.

It is an arithmetic number, because the mean of its divisors is an integer number (573069246).

Almost surely, 2^1146138491 is an apocalyptic number.

1146138491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1146138491 is an equidigital number, since it uses as much as digits as its factorization.

1146138491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 1146138491 is about 33854.6671967101. The cubic root of 1146138491 is about 1046.5155823525.

The spelling of 1146138491 in words is "one billion, one hundred forty-six million, one hundred thirty-eight thousand, four hundred ninety-one".