3951985213417 has 2 divisors, whose sum is σ = 3951985213418. Its totient is φ = 3951985213416.

The previous prime is 3951985213409. The next prime is 3951985213447. The reversal of 3951985213417 is 7143125891593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2835034267536 + 1116950945881 = 1683756^2 + 1056859^2 .

It is a cyclic number.

It is not a de Polignac number, because 3951985213417 - 2³ = 3951985213409 is a prime.

It is a super-2 number, since 2×3951985213417² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3951985213447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1975992606708 + 1975992606709.

It is an arithmetic number, because the mean of its divisors is an integer number (1975992606709).

Almost surely, 2^{3951985213417} is an apocalyptic number.

It is an amenable number.

3951985213417 is a deficient number, since it is larger than the sum of its proper divisors (1).

3951985213417 is an equidigital number, since it uses as much as digits as its factorization.

3951985213417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8164800, while the sum is 58.

The spelling of 3951985213417 in words is "three trillion, nine hundred fifty-one billion, nine hundred eighty-five million, two hundred thirteen thousand, four hundred seventeen".