39418957121 has 2 divisors, whose sum is σ = 39418957122. Its totient is φ = 39418957120.

The previous prime is 39418957037. The next prime is 39418957141. The reversal of 39418957121 is 12175981493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37855150096 + 1563807025 = 194564^2 + 39545^2 .

It is a cyclic number.

It is not a de Polignac number, because 39418957121 - 2¹⁰ = 39418956097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39418957121.

It is not a weakly prime, because it can be changed into another prime (39418957141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19709478560 + 19709478561.

It is an arithmetic number, because the mean of its divisors is an integer number (19709478561).

Almost surely, 2^39418957121 is an apocalyptic number.

It is an amenable number.

39418957121 is a deficient number, since it is larger than the sum of its proper divisors (1).

39418957121 is an equidigital number, since it uses as much as digits as its factorization.

39418957121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 50.

The spelling of 39418957121 in words is "thirty-nine billion, four hundred eighteen million, nine hundred fifty-seven thousand, one hundred twenty-one".