100040197 has 4 divisors (see below), whose sum is σ = 101030796. Its totient is φ = 99049600.

The previous prime is 100040113. The next prime is 100040201. The reversal of 100040197 is 791040001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791040001 = 7907 ⋅100043.

It can be written as a sum of positive squares in 2 ways, for example, as 53377636 + 46662561 = 7306^2 + 6831^2 .

It is a cyclic number.

It is not a de Polignac number, because 100040197 - 2²³ = 91651589 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 (100040497) 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, 495148 + ... + 495349.

It is an arithmetic number, because the mean of its divisors is an integer number (25257699).

Almost surely, 2^100040197 is an apocalyptic number.

It is an amenable number.

100040197 is a deficient number, since it is larger than the sum of its proper divisors (990599).

100040197 is an equidigital number, since it uses as much as digits as its factorization.

100040197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990598.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 100040197 is about 10002.0096480657. The cubic root of 100040197 is about 464.2210676787.

Adding to 100040197 its reverse (791040001), we get a palindrome (891080198).

The spelling of 100040197 in words is "one hundred million, forty thousand, one hundred ninety-seven".