100640237 has 4 divisors (see below), whose sum is σ = 104110620. Its totient is φ = 97169856.

The previous prime is 100640227. The next prime is 100640251. The reversal of 100640237 is 732046001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 732046001 = 23 ⋅31828087.

It can be written as a sum of positive squares in 2 ways, for example, as 80802121 + 19838116 = 8989^2 + 4454^2 .

It is a cyclic number.

It is not a de Polignac number, because 100640237 - 2¹⁰ = 100639213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100640227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1735148 + ... + 1735205.

It is an arithmetic number, because the mean of its divisors is an integer number (26027655).

Almost surely, 2^100640237 is an apocalyptic number.

It is an amenable number.

100640237 is a deficient number, since it is larger than the sum of its proper divisors (3470383).

100640237 is an equidigital number, since it uses as much as digits as its factorization.

100640237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3470382.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 100640237 is about 10031.9607754417. The cubic root of 100640237 is about 465.1473491485.

Adding to 100640237 its reverse (732046001), we get a palindrome (832686238).

The spelling of 100640237 in words is "one hundred million, six hundred forty thousand, two hundred thirty-seven".