440642197 has 2 divisors, whose sum is σ = 440642198. Its totient is φ = 440642196.

The previous prime is 440642131. The next prime is 440642203. The reversal of 440642197 is 791246044.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 346183236 + 94458961 = 18606^2 + 9719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440642197 is a prime.

It is a super-3 number, since 3×440642197³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440642107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220321098 + 220321099.

It is an arithmetic number, because the mean of its divisors is an integer number (220321099).

Almost surely, 2^440642197 is an apocalyptic number.

It is an amenable number.

440642197 is a deficient number, since it is larger than the sum of its proper divisors (1).

440642197 is an equidigital number, since it uses as much as digits as its factorization.

440642197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 440642197 is about 20991.4791522656. The cubic root of 440642197 is about 760.9603493402.

The spelling of 440642197 in words is "four hundred forty million, six hundred forty-two thousand, one hundred ninety-seven".