1045647731 has 2 divisors, whose sum is σ = 1045647732. Its totient is φ = 1045647730.

The previous prime is 1045647721. The next prime is 1045647797. The reversal of 1045647731 is 1377465401.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1045647731 is a prime.

It is a super-2 number, since 2×1045647731² = 2186758354690896722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1045647721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522823865 + 522823866.

It is an arithmetic number, because the mean of its divisors is an integer number (522823866).

Almost surely, 2^1045647731 is an apocalyptic number.

1045647731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045647731 is an equidigital number, since it uses as much as digits as its factorization.

1045647731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 1045647731 is about 32336.4767870589. The cubic root of 1045647731 is about 1014.9900849169.

The spelling of 1045647731 in words is "one billion, forty-five million, six hundred forty-seven thousand, seven hundred thirty-one".