100240691 has 2 divisors, whose sum is σ = 100240692. Its totient is φ = 100240690.

The previous prime is 100240633. The next prime is 100240709. The reversal of 100240691 is 196042001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100240691 - 2⁶ = 100240627 is a prime.

It is a super-2 number, since 2×100240691² = 20096392264314962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100240631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50120345 + 50120346.

It is an arithmetic number, because the mean of its divisors is an integer number (50120346).

Almost surely, 2^100240691 is an apocalyptic number.

100240691 is a deficient number, since it is larger than the sum of its proper divisors (1).

100240691 is an equidigital number, since it uses as much as digits as its factorization.

100240691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 100240691 is about 10012.0273171821. The cubic root of 100240691 is about 464.5309812047.

Adding to 100240691 its reverse (196042001), we get a palindrome (296282692).

The spelling of 100240691 in words is "one hundred million, two hundred forty thousand, six hundred ninety-one".