149840881 has 2 divisors, whose sum is σ = 149840882. Its totient is φ = 149840880.

The previous prime is 149840879. The next prime is 149840903. The reversal of 149840881 is 188048941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105165025 + 44675856 = 10255^2 + 6684^2 .

It is a cyclic number.

It is not a de Polignac number, because 149840881 - 2¹ = 149840879 is a prime.

It is a super-2 number, since 2×149840881² = 44904579237712322, which contains 22 as substring.

Together with 149840879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (149840851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74920440 + 74920441.

It is an arithmetic number, because the mean of its divisors is an integer number (74920441).

Almost surely, 2^149840881 is an apocalyptic number.

It is an amenable number.

149840881 is a deficient number, since it is larger than the sum of its proper divisors (1).

149840881 is an equidigital number, since it uses as much as digits as its factorization.

149840881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 43.

The square root of 149840881 is about 12240.9509842986. The cubic root of 149840881 is about 531.1413412650.

The spelling of 149840881 in words is "one hundred forty-nine million, eight hundred forty thousand, eight hundred eighty-one".