149998689 has 8 divisors (see below), whose sum is σ = 222220320. Its totient is φ = 99999108.

The previous prime is 149998687. The next prime is 149998727. The reversal of 149998689 is 986899941.

It is not a de Polignac number, because 149998689 - 2¹ = 149998687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149998687) 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, 2777727 + ... + 2777780.

It is an arithmetic number, because the mean of its divisors is an integer number (27777540).

Almost surely, 2^149998689 is an apocalyptic number.

It is an amenable number.

149998689 is a deficient number, since it is larger than the sum of its proper divisors (72221631).

149998689 is an equidigital number, since it uses as much as digits as its factorization.

149998689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555516 (or 5555510 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The square root of 149998689 is about 12247.3951924481. The cubic root of 149998689 is about 531.3277366475.

The spelling of 149998689 in words is "one hundred forty-nine million, nine hundred ninety-eight thousand, six hundred eighty-nine".