499148581 has 2 divisors, whose sum is σ = 499148582. Its totient is φ = 499148580.

The previous prime is 499148569. The next prime is 499148591. The reversal of 499148581 is 185841994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 492440481 + 6708100 = 22191^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 499148581 - 2⁵ = 499148549 is a prime.

It is a super-2 number, since 2×499148581² = 498298611828627122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499148501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249574290 + 249574291.

It is an arithmetic number, because the mean of its divisors is an integer number (249574291).

Almost surely, 2^499148581 is an apocalyptic number.

It is an amenable number.

499148581 is a deficient number, since it is larger than the sum of its proper divisors (1).

499148581 is an equidigital number, since it uses as much as digits as its factorization.

499148581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 49.

The square root of 499148581 is about 22341.6333556882. The cubic root of 499148581 is about 793.2497555521.

The spelling of 499148581 in words is "four hundred ninety-nine million, one hundred forty-eight thousand, five hundred eighty-one".