149505819 has 16 divisors (see below), whose sum is σ = 209174784. Its totient is φ = 94802400.

The previous prime is 149505793. The next prime is 149505821. The reversal of 149505819 is 918505941.

149505819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 149505819 - 2⁷ = 149505691 is a prime.

It is a super-2 number, since 2×149505819² = 44703979829721522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149505869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6504 + ... + 18474.

It is an arithmetic number, because the mean of its divisors is an integer number (13073424).

Almost surely, 2^149505819 is an apocalyptic number.

149505819 is a deficient number, since it is larger than the sum of its proper divisors (59668965).

149505819 is a wasteful number, since it uses less digits than its factorization.

149505819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12178.

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 149505819 is about 12227.2572149276. The cubic root of 149505819 is about 530.7451474394.

The spelling of 149505819 in words is "one hundred forty-nine million, five hundred five thousand, eight hundred nineteen".