149968019 has 4 divisors (see below), whose sum is σ = 155139360. Its totient is φ = 144796680.

The previous prime is 149968001. The next prime is 149968051. The reversal of 149968019 is 910869941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910869941 = 593 ⋅1536037.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149968019 is a prime.

It is a super-2 number, since 2×149968019² = 44980813445568722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149968069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2585627 + ... + 2585684.

It is an arithmetic number, because the mean of its divisors is an integer number (38784840).

Almost surely, 2^149968019 is an apocalyptic number.

149968019 is a deficient number, since it is larger than the sum of its proper divisors (5171341).

149968019 is an equidigital number, since it uses as much as digits as its factorization.

149968019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171340.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 149968019 is about 12246.1430254591. The cubic root of 149968019 is about 531.2915209255.

The spelling of 149968019 in words is "one hundred forty-nine million, nine hundred sixty-eight thousand, nineteen".