393922899247 has 2 divisors, whose sum is σ = 393922899248. Its totient is φ = 393922899246.

The previous prime is 393922899217. The next prime is 393922899263. The reversal of 393922899247 is 742998229393.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 393922899247 - 2¹⁵ = 393922866479 is a prime.

It is a super-2 number, since 2×393922899247² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393922899217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196961449623 + 196961449624.

It is an arithmetic number, because the mean of its divisors is an integer number (196961449624).

Almost surely, 2^393922899247 is an apocalyptic number.

393922899247 is a deficient number, since it is larger than the sum of its proper divisors (1).

393922899247 is an equidigital number, since it uses as much as digits as its factorization.

393922899247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105815808, while the sum is 67.

The spelling of 393922899247 in words is "three hundred ninety-three billion, nine hundred twenty-two million, eight hundred ninety-nine thousand, two hundred forty-seven".