149128867 has 4 divisors (see below), whose sum is σ = 150666376. Its totient is φ = 147591360.

The previous prime is 149128843. The next prime is 149128877. The reversal of 149128867 is 768821941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768821941 = 4549 ⋅169009.

It is a cyclic number.

It is not a de Polignac number, because 149128867 - 2¹⁹ = 148604579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149128807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768609 + ... + 768802.

It is an arithmetic number, because the mean of its divisors is an integer number (37666594).

Almost surely, 2^149128867 is an apocalyptic number.

149128867 is a deficient number, since it is larger than the sum of its proper divisors (1537509).

149128867 is an equidigital number, since it uses as much as digits as its factorization.

149128867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537508.

The product of its digits is 193536, while the sum is 46.

The square root of 149128867 is about 12211.8330728847. The cubic root of 149128867 is about 530.2987125892.

The spelling of 149128867 in words is "one hundred forty-nine million, one hundred twenty-eight thousand, eight hundred sixty-seven".