146931493 has 8 divisors (see below), whose sum is σ = 158126040. Its totient is φ = 136020480.

The previous prime is 146931481. The next prime is 146931509. The reversal of 146931493 is 394139641.

It can be written as a sum of positive squares in 4 ways, for example, as 20638849 + 126292644 = 4543^2 + 11238^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 146931493 - 2⁵ = 146931461 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 (146731493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69808 + ... + 71881.

It is an arithmetic number, because the mean of its divisors is an integer number (19765755).

Almost surely, 2^146931493 is an apocalyptic number.

It is an amenable number.

146931493 is a deficient number, since it is larger than the sum of its proper divisors (11194547).

146931493 is a wasteful number, since it uses less digits than its factorization.

146931493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141767.

The product of its digits is 69984, while the sum is 40.

The square root of 146931493 is about 12121.5301426841. The cubic root of 146931493 is about 527.6812108490.

The spelling of 146931493 in words is "one hundred forty-six million, nine hundred thirty-one thousand, four hundred ninety-three".