208233997 has 2 divisors, whose sum is σ = 208233998. Its totient is φ = 208233996.

The previous prime is 208233989. The next prime is 208234021. The reversal of 208233997 is 799332802.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135745801 + 72488196 = 11651^2 + 8514^2 .

It is a cyclic number.

It is not a de Polignac number, because 208233997 - 2³ = 208233989 is a prime.

It is a super-2 number, since 2×208233997² = 86722795013192018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208233917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104116998 + 104116999.

It is an arithmetic number, because the mean of its divisors is an integer number (104116999).

Almost surely, 2^208233997 is an apocalyptic number.

It is an amenable number.

208233997 is a deficient number, since it is larger than the sum of its proper divisors (1).

208233997 is an equidigital number, since it uses as much as digits as its factorization.

208233997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 208233997 is about 14430.3152079225. The cubic root of 208233997 is about 592.7213147720.

The spelling of 208233997 in words is "two hundred eight million, two hundred thirty-three thousand, nine hundred ninety-seven".