149001987 has 8 divisors (see below), whose sum is σ = 198725904. Its totient is φ = 99306368.

The previous prime is 149001977. The next prime is 149002001. The reversal of 149001987 is 789100941.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 149001987 - 2⁷ = 149001859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149001917) 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, 15583 + ... + 23255.

It is an arithmetic number, because the mean of its divisors is an integer number (24840738).

Almost surely, 2^149001987 is an apocalyptic number.

149001987 is a deficient number, since it is larger than the sum of its proper divisors (49723917).

149001987 is an equidigital number, since it uses as much as digits as its factorization.

149001987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14149.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 149001987 is about 12206.6370061537. The cubic root of 149001987 is about 530.1482758270.

The spelling of 149001987 in words is "one hundred forty-nine million, one thousand, nine hundred eighty-seven".