1009494481 has 2 divisors, whose sum is σ = 1009494482. Its totient is φ = 1009494480.

The previous prime is 1009494461. The next prime is 1009494503. The reversal of 1009494481 is 1844949001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624550081 + 384944400 = 24991^2 + 19620^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009494481 - 2¹⁷ = 1009363409 is a prime.

It is a super-2 number, since 2×1009494481² = 2038158214338918722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1009494461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504747240 + 504747241.

It is an arithmetic number, because the mean of its divisors is an integer number (504747241).

Almost surely, 2^1009494481 is an apocalyptic number.

It is an amenable number.

1009494481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009494481 is an equidigital number, since it uses as much as digits as its factorization.

1009494481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1009494481 is about 31772.5428790331. The cubic root of 1009494481 is about 1003.1548633702.

The spelling of 1009494481 in words is "one billion, nine million, four hundred ninety-four thousand, four hundred eighty-one".