149110781 has 4 divisors (see below), whose sum is σ = 149157372. Its totient is φ = 149064192.

The previous prime is 149110763. The next prime is 149110789. The reversal of 149110781 is 187011941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13388281 + 135722500 = 3659^2 + 11650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149110781 is a prime.

It is a super-2 number, since 2×149110781² = 44468050020859922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149110789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18110 + ... + 25023.

It is an arithmetic number, because the mean of its divisors is an integer number (37289343).

Almost surely, 2^149110781 is an apocalyptic number.

It is an amenable number.

149110781 is a deficient number, since it is larger than the sum of its proper divisors (46591).

149110781 is an equidigital number, since it uses as much as digits as its factorization.

149110781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46590.

The product of its (nonzero) digits is 2016, while the sum is 32.

The square root of 149110781 is about 12211.0925391629. The cubic root of 149110781 is about 530.2772739269.

The spelling of 149110781 in words is "one hundred forty-nine million, one hundred ten thousand, seven hundred eighty-one".