149001986 has 16 divisors (see below), whose sum is σ = 255704064. Its totient is φ = 63789984.

The previous prime is 149001977. The next prime is 149002001. The reversal of 149001986 is 689100941.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9311 + ... + 19613.

It is an arithmetic number, because the mean of its divisors is an integer number (15981504).

Almost surely, 2^149001986 is an apocalyptic number.

149001986 is a deficient number, since it is larger than the sum of its proper divisors (106702078).

149001986 is a wasteful number, since it uses less digits than its factorization.

149001986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11345.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 149001986 is about 12206.6369651923. The cubic root of 149001986 is about 530.1482746410.

The spelling of 149001986 in words is "one hundred forty-nine million, one thousand, nine hundred eighty-six".