149831601 has 4 divisors (see below), whose sum is σ = 199775472. Its totient is φ = 99887732.

The previous prime is 149831599. The next prime is 149831623. The reversal of 149831601 is 106138941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 149831601 - 2¹ = 149831599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149831681) 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, 24971931 + ... + 24971936.

It is an arithmetic number, because the mean of its divisors is an integer number (49943868).

Almost surely, 2^149831601 is an apocalyptic number.

It is an amenable number.

149831601 is a deficient number, since it is larger than the sum of its proper divisors (49943871).

149831601 is an equidigital number, since it uses as much as digits as its factorization.

149831601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49943870.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 149831601 is about 12240.5719229128. The cubic root of 149831601 is about 531.1303760923.

The spelling of 149831601 in words is "one hundred forty-nine million, eight hundred thirty-one thousand, six hundred one".