149869019 has 2 divisors, whose sum is σ = 149869020. Its totient is φ = 149869018.

The previous prime is 149868967. The next prime is 149869039. The reversal of 149869019 is 910968941.

It is a strong prime.

It is an emirp because it is prime and its reverse (910968941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149869019 - 2¹⁶ = 149803483 is a prime.

It is a super-2 number, since 2×149869019² = 44921445712044722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149869039) 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 as a sum of consecutive naturals, namely, 74934509 + 74934510.

It is an arithmetic number, because the mean of its divisors is an integer number (74934510).

Almost surely, 2^149869019 is an apocalyptic number.

149869019 is a deficient number, since it is larger than the sum of its proper divisors (1).

149869019 is an equidigital number, since it uses as much as digits as its factorization.

149869019 is an odious number, because the sum of its binary digits is odd.

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

The square root of 149869019 is about 12242.1002691532. The cubic root of 149869019 is about 531.1745861302.

The spelling of 149869019 in words is "one hundred forty-nine million, eight hundred sixty-nine thousand, nineteen".