1027491749 has 2 divisors, whose sum is σ = 1027491750. Its totient is φ = 1027491748.

The previous prime is 1027491737. The next prime is 1027491757. The reversal of 1027491749 is 9471947201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 772450849 + 255040900 = 27793^2 + 15970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1027491749 - 2⁴ = 1027491733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1027491349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513745874 + 513745875.

It is an arithmetic number, because the mean of its divisors is an integer number (513745875).

Almost surely, 2^1027491749 is an apocalyptic number.

It is an amenable number.

1027491749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1027491749 is an equidigital number, since it uses as much as digits as its factorization.

1027491749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 1027491749 is about 32054.5121472781. The cubic root of 1027491749 is about 1009.0811985300.

The spelling of 1027491749 in words is "one billion, twenty-seven million, four hundred ninety-one thousand, seven hundred forty-nine".