149717901 has 4 divisors (see below), whose sum is σ = 199623872. Its totient is φ = 99811932.

The previous prime is 149717839. The next prime is 149717903. The reversal of 149717901 is 109717941.

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, and also an emirpimes, since its reverse is a distinct semiprime: 109717941 = 3 ⋅36572647.

It is not a de Polignac number, because 149717901 - 2⁶ = 149717837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 149717901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149717903) 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, 24952981 + ... + 24952986.

It is an arithmetic number, because the mean of its divisors is an integer number (49905968).

Almost surely, 2^149717901 is an apocalyptic number.

It is an amenable number.

149717901 is a deficient number, since it is larger than the sum of its proper divisors (49905971).

149717901 is an equidigital number, since it uses as much as digits as its factorization.

149717901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49905970.

The product of its (nonzero) digits is 15876, while the sum is 39.

The square root of 149717901 is about 12235.9266506464. The cubic root of 149717901 is about 530.9959923233.

The spelling of 149717901 in words is "one hundred forty-nine million, seven hundred seventeen thousand, nine hundred one".