293190021 has 6 divisors (see below), whose sum is σ = 423496710. Its totient is φ = 195460008.

The previous prime is 293190017. The next prime is 293190031. The reversal of 293190021 is 120091392.

It can be written as a sum of positive squares in only one way, i.e., 263705121 + 29484900 = 16239^2 + 5430^2 .

It is not a de Polignac number, because 293190021 - 2² = 293190017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (293190031) 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, 16288326 + ... + 16288343.

It is an arithmetic number, because the mean of its divisors is an integer number (70582785).

Almost surely, 2^293190021 is an apocalyptic number.

It is an amenable number.

293190021 is a deficient number, since it is larger than the sum of its proper divisors (130306689).

293190021 is a wasteful number, since it uses less digits than its factorization.

293190021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32576675 (or 32576672 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 293190021 is about 17122.7924416551. The cubic root of 293190021 is about 664.3287711450.

The spelling of 293190021 in words is "two hundred ninety-three million, one hundred ninety thousand, twenty-one".