39117121 has 2 divisors, whose sum is σ = 39117122. Its totient is φ = 39117120.

The previous prime is 39117083. The next prime is 39117131. The reversal of 39117121 is 12171193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34386496 + 4730625 = 5864^2 + 2175^2 .

It is a cyclic number.

It is not a de Polignac number, because 39117121 - 2¹¹ = 39115073 is a prime.

It is not a weakly prime, because it can be changed into another prime (39117131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19558560 + 19558561.

It is an arithmetic number, because the mean of its divisors is an integer number (19558561).

Almost surely, 2^39117121 is an apocalyptic number.

It is an amenable number.

39117121 is a deficient number, since it is larger than the sum of its proper divisors (1).

39117121 is an equidigital number, since it uses as much as digits as its factorization.

39117121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 25.

The square root of 39117121 is about 6254.3681535388. The cubic root of 39117121 is about 339.4602769036.

The spelling of 39117121 in words is "thirty-nine million, one hundred seventeen thousand, one hundred twenty-one".