148886581 has 2 divisors, whose sum is σ = 148886582. Its totient is φ = 148886580.

The previous prime is 148886579. The next prime is 148886623. The reversal of 148886581 is 185688841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144720900 + 4165681 = 12030^2 + 2041^2 .

It is a cyclic number.

It is not a de Polignac number, because 148886581 - 2¹ = 148886579 is a prime.

It is a super-2 number, since 2×148886581² = 44334428003739122, which contains 22 as substring.

Together with 148886579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148886281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74443290 + 74443291.

It is an arithmetic number, because the mean of its divisors is an integer number (74443291).

Almost surely, 2^148886581 is an apocalyptic number.

It is an amenable number.

148886581 is a deficient number, since it is larger than the sum of its proper divisors (1).

148886581 is an equidigital number, since it uses as much as digits as its factorization.

148886581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 491520, while the sum is 49.

The square root of 148886581 is about 12201.9089080357. The cubic root of 148886581 is about 530.0113691640.

The spelling of 148886581 in words is "one hundred forty-eight million, eight hundred eighty-six thousand, five hundred eighty-one".