149489869 has 2 divisors, whose sum is σ = 149489870. Its totient is φ = 149489868.

The previous prime is 149489803. The next prime is 149489927. The reversal of 149489869 is 968984941.

It is a happy number.

It is an a-pointer prime, because the next prime (149489927) can be obtained adding 149489869 to its sum of digits (58).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149084100 + 405769 = 12210^2 + 637^2 .

It is a cyclic number.

It is not a de Polignac number, because 149489869 - 2⁷ = 149489741 is a prime.

It is a super-2 number, since 2×149489869² = 44694441867274322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149489269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74744934 + 74744935.

It is an arithmetic number, because the mean of its divisors is an integer number (74744935).

Almost surely, 2^149489869 is an apocalyptic number.

It is an amenable number.

149489869 is a deficient number, since it is larger than the sum of its proper divisors (1).

149489869 is an equidigital number, since it uses as much as digits as its factorization.

149489869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 58.

The square root of 149489869 is about 12226.6049662202. The cubic root of 149489869 is about 530.7262726196.

The spelling of 149489869 in words is "one hundred forty-nine million, four hundred eighty-nine thousand, eight hundred sixty-nine".