146531493 has 6 divisors (see below), whose sum is σ = 211656614. Its totient is φ = 97687656.

The previous prime is 146531453. The next prime is 146531521. The reversal of 146531493 is 394135641.

It can be written as a sum of positive squares in only one way, i.e., 142134084 + 4397409 = 11922^2 + 2097^2 .

It is not a de Polignac number, because 146531493 - 2⁸ = 146531237 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 (146531443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8140630 + ... + 8140647.

Almost surely, 2^146531493 is an apocalyptic number.

It is an amenable number.

146531493 is a deficient number, since it is larger than the sum of its proper divisors (65125121).

146531493 is a wasteful number, since it uses less digits than its factorization.

146531493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16281283 (or 16281280 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 146531493 is about 12105.0193308396. The cubic root of 146531493 is about 527.2019300893.

The spelling of 146531493 in words is "one hundred forty-six million, five hundred thirty-one thousand, four hundred ninety-three".