1018745731 has 2 divisors, whose sum is σ = 1018745732. Its totient is φ = 1018745730.

The previous prime is 1018745729. The next prime is 1018745779. The reversal of 1018745731 is 1375478101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1018745731 - 2¹ = 1018745729 is a prime.

It is a super-2 number, since 2×1018745731² = 2075685728861448722, which contains 22 as substring.

Together with 1018745729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1018745711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509372865 + 509372866.

It is an arithmetic number, because the mean of its divisors is an integer number (509372866).

Almost surely, 2^1018745731 is an apocalyptic number.

1018745731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018745731 is an equidigital number, since it uses as much as digits as its factorization.

1018745731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 1018745731 is about 31917.7964621620. The cubic root of 1018745731 is about 1006.2099338959.

The spelling of 1018745731 in words is "one billion, eighteen million, seven hundred forty-five thousand, seven hundred thirty-one".