149198719 has 2 divisors, whose sum is σ = 149198720. Its totient is φ = 149198718.

The previous prime is 149198717. The next prime is 149198729. The reversal of 149198719 is 917891941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149198719 - 2¹ = 149198717 is a prime.

It is a super-2 number, since 2×149198719² = 44520515502481922, which contains 22 as substring.

Together with 149198717, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149198717) 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, 74599359 + 74599360.

It is an arithmetic number, because the mean of its divisors is an integer number (74599360).

Almost surely, 2^149198719 is an apocalyptic number.

149198719 is a deficient number, since it is larger than the sum of its proper divisors (1).

149198719 is an equidigital number, since it uses as much as digits as its factorization.

149198719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 49.

The square root of 149198719 is about 12214.6927509455. The cubic root of 149198719 is about 530.3814970166.

The spelling of 149198719 in words is "one hundred forty-nine million, one hundred ninety-eight thousand, seven hundred nineteen".