40198117 has 2 divisors, whose sum is σ = 40198118. Its totient is φ = 40198116.

The previous prime is 40198111. The next prime is 40198121. The reversal of 40198117 is 71189104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36012001 + 4186116 = 6001^2 + 2046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40198117 is a prime.

It is a super-2 number, since 2×40198117² = 3231777220691378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40198111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20099058 + 20099059.

It is an arithmetic number, because the mean of its divisors is an integer number (20099059).

Almost surely, 2^40198117 is an apocalyptic number.

It is an amenable number.

40198117 is a deficient number, since it is larger than the sum of its proper divisors (1).

40198117 is an equidigital number, since it uses as much as digits as its factorization.

40198117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 40198117 is about 6340.1984984699. The cubic root of 40198117 is about 342.5588852170.

The spelling of 40198117 in words is "forty million, one hundred ninety-eight thousand, one hundred seventeen".