149781494 has 4 divisors (see below), whose sum is σ = 224672244. Its totient is φ = 74890746.

The previous prime is 149781493. The next prime is 149781521. The reversal of 149781494 is 494187941.

149781494 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149781493) 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 as a sum of consecutive naturals, namely, 37445372 + ... + 37445375.

It is an arithmetic number, because the mean of its divisors is an integer number (56168061).

Almost surely, 2^149781494 is an apocalyptic number.

149781494 is a deficient number, since it is larger than the sum of its proper divisors (74890750).

149781494 is an equidigital number, since it uses as much as digits as its factorization.

149781494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74890749.

The product of its digits is 290304, while the sum is 47.

The square root of 149781494 is about 12238.5249928249. The cubic root of 149781494 is about 531.0711622442.

The spelling of 149781494 in words is "one hundred forty-nine million, seven hundred eighty-one thousand, four hundred ninety-four".