149858987 has 2 divisors, whose sum is σ = 149858988. Its totient is φ = 149858986.

The previous prime is 149858959. The next prime is 149858993. The reversal of 149858987 is 789858941.

It is a strong prime.

It is an emirp because it is prime and its reverse (789858941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149858987 - 2¹⁴ = 149842603 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (149858887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74929493 + 74929494.

It is an arithmetic number, because the mean of its divisors is an integer number (74929494).

Almost surely, 2^149858987 is an apocalyptic number.

149858987 is a deficient number, since it is larger than the sum of its proper divisors (1).

149858987 is an equidigital number, since it uses as much as digits as its factorization.

149858987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 59.

The square root of 149858987 is about 12241.6905286811. The cubic root of 149858987 is about 531.1627338643.

The spelling of 149858987 in words is "one hundred forty-nine million, eight hundred fifty-eight thousand, nine hundred eighty-seven".