990460181 has 2 divisors, whose sum is σ = 990460182. Its totient is φ = 990460180.

The previous prime is 990460169. The next prime is 990460223. The reversal of 990460181 is 181064099.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 971319556 + 19140625 = 31166^2 + 4375^2 .

It is a cyclic number.

It is not a de Polignac number, because 990460181 - 2⁶ = 990460117 is a prime.

It is a super-2 number, since 2×990460181² = 1962022740293105522, which contains 22 as substring.

It is a Chen prime.

It is equal to p_50386952 and since 990460181 and 50386952 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990460381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495230090 + 495230091.

It is an arithmetic number, because the mean of its divisors is an integer number (495230091).

Almost surely, 2^990460181 is an apocalyptic number.

It is an amenable number.

990460181 is a deficient number, since it is larger than the sum of its proper divisors (1).

990460181 is an equidigital number, since it uses as much as digits as its factorization.

990460181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 990460181 is about 31471.5773516359. The cubic root of 990460181 is about 996.8098943811.

The spelling of 990460181 in words is "nine hundred ninety million, four hundred sixty thousand, one hundred eighty-one".