140020417 has 2 divisors, whose sum is σ = 140020418. Its totient is φ = 140020416.

The previous prime is 140020403. The next prime is 140020429. The reversal of 140020417 is 714020041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78570496 + 61449921 = 8864^2 + 7839^2 .

It is a cyclic number.

It is not a de Polignac number, because 140020417 - 2²³ = 131631809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140020394 and 140020403.

It is not a weakly prime, because it can be changed into another prime (140020457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70010208 + 70010209.

It is an arithmetic number, because the mean of its divisors is an integer number (70010209).

Almost surely, 2^140020417 is an apocalyptic number.

It is an amenable number.

140020417 is a deficient number, since it is larger than the sum of its proper divisors (1).

140020417 is an equidigital number, since it uses as much as digits as its factorization.

140020417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 140020417 is about 11833.0223104666. The cubic root of 140020417 is about 519.2746506610.

Adding to 140020417 its reverse (714020041), we get a palindrome (854040458).

The spelling of 140020417 in words is "one hundred forty million, twenty thousand, four hundred seventeen".