149023987 has 8 divisors (see below), whose sum is σ = 171078656. Its totient is φ = 127160712.

The previous prime is 149023967. The next prime is 149023991. The reversal of 149023987 is 789320941.

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

It is not a de Polignac number, because 149023987 - 2²³ = 140635379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149023907) 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, 46173 + ... + 49294.

It is an arithmetic number, because the mean of its divisors is an integer number (21384832).

Almost surely, 2^149023987 is an apocalyptic number.

149023987 is a deficient number, since it is larger than the sum of its proper divisors (22054669).

149023987 is an equidigital number, since it uses as much as digits as its factorization.

149023987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95697.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 149023987 is about 12207.5381219966. The cubic root of 149023987 is about 530.1743665039.

The spelling of 149023987 in words is "one hundred forty-nine million, twenty-three thousand, nine hundred eighty-seven".