220790497 has 4 divisors (see below), whose sum is σ = 222010516. Its totient is φ = 219570480.

The previous prime is 220790483. The next prime is 220790561. The reversal of 220790497 is 794097022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40398736 + 180391761 = 6356^2 + 13431^2 .

It is a cyclic number.

It is not a de Polignac number, because 220790497 - 2¹⁹ = 220266209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220790417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609738 + ... + 610099.

It is an arithmetic number, because the mean of its divisors is an integer number (55502629).

Almost surely, 2^220790497 is an apocalyptic number.

It is an amenable number.

220790497 is a deficient number, since it is larger than the sum of its proper divisors (1220019).

220790497 is a wasteful number, since it uses less digits than its factorization.

220790497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220018.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 220790497 is about 14859.0207281638. The cubic root of 220790497 is about 604.4032519418.

The spelling of 220790497 in words is "two hundred twenty million, seven hundred ninety thousand, four hundred ninety-seven".