149418389 has 8 divisors (see below), whose sum is σ = 158458968. Its totient is φ = 140405760.

The previous prime is 149418383. The next prime is 149418403. The reversal of 149418389 is 983814941.

It can be written as a sum of positive squares in 4 ways, for example, as 16200625 + 133217764 = 4025^2 + 11542^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149418389 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149418383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4589 + ... + 17885.

It is an arithmetic number, because the mean of its divisors is an integer number (19807371).

Almost surely, 2^149418389 is an apocalyptic number.

It is an amenable number.

149418389 is a deficient number, since it is larger than the sum of its proper divisors (9040579).

149418389 is a wasteful number, since it uses less digits than its factorization.

149418389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13975.

The product of its digits is 248832, while the sum is 47.

The square root of 149418389 is about 12223.6814830885. The cubic root of 149418389 is about 530.6416685316.

The spelling of 149418389 in words is "one hundred forty-nine million, four hundred eighteen thousand, three hundred eighty-nine".