149351987 has 8 divisors (see below), whose sum is σ = 159538896. Its totient is φ = 139320832.

The previous prime is 149351963. The next prime is 149352013. The reversal of 149351987 is 789153941.

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 149351987 - 2⁸ = 149351731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149351927) 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, 36953 + ... + 40794.

It is an arithmetic number, because the mean of its divisors is an integer number (19942362).

Almost surely, 2^149351987 is an apocalyptic number.

149351987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

149351987 is a deficient number, since it is larger than the sum of its proper divisors (10186909).

149351987 is a wasteful number, since it uses less digits than its factorization.

149351987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77877.

The product of its digits is 272160, while the sum is 47.

The square root of 149351987 is about 12220.9650600924. The cubic root of 149351987 is about 530.5630506113.

The spelling of 149351987 in words is "one hundred forty-nine million, three hundred fifty-one thousand, nine hundred eighty-seven".