149825019 has 4 divisors (see below), whose sum is σ = 199766696. Its totient is φ = 99883344.

The previous prime is 149825017. The next prime is 149825023. The reversal of 149825019 is 910528941.

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

It is not a de Polignac number, because 149825019 - 2¹ = 149825017 is a prime.

It is a super-2 number, since 2×149825019² = 44895072636700722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149825017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24970834 + ... + 24970839.

It is an arithmetic number, because the mean of its divisors is an integer number (49941674).

Almost surely, 2^149825019 is an apocalyptic number.

149825019 is a deficient number, since it is larger than the sum of its proper divisors (49941677).

149825019 is an equidigital number, since it uses as much as digits as its factorization.

149825019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49941676.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 149825019 is about 12240.3030599736. The cubic root of 149825019 is about 531.1225985801.

The spelling of 149825019 in words is "one hundred forty-nine million, eight hundred twenty-five thousand, nineteen".