39954157 has 2 divisors, whose sum is σ = 39954158. Its totient is φ = 39954156.

The previous prime is 39954127. The next prime is 39954179. The reversal of 39954157 is 75145993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36735721 + 3218436 = 6061^2 + 1794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39954157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39954107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19977078 + 19977079.

It is an arithmetic number, because the mean of its divisors is an integer number (19977079).

Almost surely, 2^39954157 is an apocalyptic number.

It is an amenable number.

39954157 is a deficient number, since it is larger than the sum of its proper divisors (1).

39954157 is an equidigital number, since it uses as much as digits as its factorization.

39954157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100, while the sum is 43.

The square root of 39954157 is about 6320.9300739685. The cubic root of 39954157 is about 341.8644886795.

The spelling of 39954157 in words is "thirty-nine million, nine hundred fifty-four thousand, one hundred fifty-seven".