140265817 has 2 divisors, whose sum is σ = 140265818. Its totient is φ = 140265816.

The previous prime is 140265791. The next prime is 140265821. The reversal of 140265817 is 718562041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112975641 + 27290176 = 10629^2 + 5224^2 .

It is an emirp because it is prime and its reverse (718562041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140265817 - 2⁷ = 140265689 is a prime.

It is not a weakly prime, because it can be changed into another prime (140265877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70132908 + 70132909.

It is an arithmetic number, because the mean of its divisors is an integer number (70132909).

Almost surely, 2^140265817 is an apocalyptic number.

It is an amenable number.

140265817 is a deficient number, since it is larger than the sum of its proper divisors (1).

140265817 is an equidigital number, since it uses as much as digits as its factorization.

140265817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 140265817 is about 11843.3870577635. The cubic root of 140265817 is about 519.5778341294.

The spelling of 140265817 in words is "one hundred forty million, two hundred sixty-five thousand, eight hundred seventeen".