149092591 has 4 divisors (see below), whose sum is σ = 149842000. Its totient is φ = 148343184.

The previous prime is 149092583. The next prime is 149092597. The reversal of 149092591 is 195290941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195290941 = 1009 ⋅193549.

It is a cyclic number.

It is not a de Polignac number, because 149092591 - 2³ = 149092583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149092597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374406 + ... + 374803.

It is an arithmetic number, because the mean of its divisors is an integer number (37460500).

Almost surely, 2^149092591 is an apocalyptic number.

149092591 is a deficient number, since it is larger than the sum of its proper divisors (749409).

149092591 is an equidigital number, since it uses as much as digits as its factorization.

149092591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749408.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 149092591 is about 12210.3477018470. The cubic root of 149092591 is about 530.2557102371.

The spelling of 149092591 in words is "one hundred forty-nine million, ninety-two thousand, five hundred ninety-one".