149719771 has 2 divisors, whose sum is σ = 149719772. Its totient is φ = 149719770.

The previous prime is 149719727. The next prime is 149719789. The reversal of 149719771 is 177917941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149719771 - 2¹¹ = 149717723 is a prime.

It is not a weakly prime, because it can be changed into another prime (149729771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74859885 + 74859886.

It is an arithmetic number, because the mean of its divisors is an integer number (74859886).

Almost surely, 2^149719771 is an apocalyptic number.

149719771 is a deficient number, since it is larger than the sum of its proper divisors (1).

149719771 is an equidigital number, since it uses as much as digits as its factorization.

149719771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 46.

The square root of 149719771 is about 12236.0030647267. The cubic root of 149719771 is about 530.9982030551.

It can be divided in two parts, 14971 and 9771, that added together give a palindrome (24742).

The spelling of 149719771 in words is "one hundred forty-nine million, seven hundred nineteen thousand, seven hundred seventy-one".