220003997 has 2 divisors, whose sum is σ = 220003998. Its totient is φ = 220003996.

The previous prime is 220003933. The next prime is 220004011. The reversal of 220003997 is 799300022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202606756 + 17397241 = 14234^2 + 4171^2 .

It is a cyclic number.

It is not a de Polignac number, because 220003997 - 2⁶ = 220003933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220003097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110001998 + 110001999.

It is an arithmetic number, because the mean of its divisors is an integer number (110001999).

Almost surely, 2^220003997 is an apocalyptic number.

It is an amenable number.

220003997 is a deficient number, since it is larger than the sum of its proper divisors (1).

220003997 is an equidigital number, since it uses as much as digits as its factorization.

220003997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 220003997 is about 14832.5317124219. The cubic root of 220003997 is about 603.6847295868.

The spelling of 220003997 in words is "two hundred twenty million, three thousand, nine hundred ninety-seven".