146989901 has 4 divisors (see below), whose sum is σ = 147014172. Its totient is φ = 146965632.

The previous prime is 146989891. The next prime is 146989907. The reversal of 146989901 is 109989641.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 109989641 = 37 ⋅2972693.

It can be written as a sum of positive squares in 2 ways, for example, as 16801801 + 130188100 = 4099^2 + 11410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146989901 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 (146989907) 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, 5291 + ... + 17943.

It is an arithmetic number, because the mean of its divisors is an integer number (36753543).

Almost surely, 2^146989901 is an apocalyptic number.

It is an amenable number.

146989901 is a deficient number, since it is larger than the sum of its proper divisors (24271).

146989901 is a wasteful number, since it uses less digits than its factorization.

146989901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24270.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 146989901 is about 12123.9391700882. The cubic root of 146989901 is about 527.7511226165.

The spelling of 146989901 in words is "one hundred forty-six million, nine hundred eighty-nine thousand, nine hundred one".