120231997 has 2 divisors, whose sum is σ = 120231998. Its totient is φ = 120231996.

The previous prime is 120231977. The next prime is 120232001. The reversal of 120231997 is 799132021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108868356 + 11363641 = 10434^2 + 3371^2 .

It is an emirp because it is prime and its reverse (799132021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120231997 - 2⁷ = 120231869 is a prime.

It is equal to p_6854182 and since 120231997 and 6854182 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120231977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60115998 + 60115999.

It is an arithmetic number, because the mean of its divisors is an integer number (60115999).

Almost surely, 2^120231997 is an apocalyptic number.

It is an amenable number.

120231997 is a deficient number, since it is larger than the sum of its proper divisors (1).

120231997 is an equidigital number, since it uses as much as digits as its factorization.

120231997 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 34.

The square root of 120231997 is about 10965.0352028619. The cubic root of 120231997 is about 493.5600734670.

The spelling of 120231997 in words is "one hundred twenty million, two hundred thirty-one thousand, nine hundred ninety-seven".