100311997 has 2 divisors, whose sum is σ = 100311998. Its totient is φ = 100311996.

The previous prime is 100311979. The next prime is 100312007. The reversal of 100311997 is 799113001.

Together with previous prime (100311979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99082116 + 1229881 = 9954^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 100311997 - 2¹⁵ = 100279229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100321997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50155998 + 50155999.

It is an arithmetic number, because the mean of its divisors is an integer number (50155999).

Almost surely, 2^100311997 is an apocalyptic number.

It is an amenable number.

100311997 is a deficient number, since it is larger than the sum of its proper divisors (1).

100311997 is an equidigital number, since it uses as much as digits as its factorization.

100311997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 100311997 is about 10015.5877011786. The cubic root of 100311997 is about 464.6411028022.

Adding to 100311997 its reverse (799113001), we get a palindrome (899424998).

The spelling of 100311997 in words is "one hundred million, three hundred eleven thousand, nine hundred ninety-seven".