39954823 has 2 divisors, whose sum is σ = 39954824. Its totient is φ = 39954822.

The previous prime is 39954791. The next prime is 39954829. The reversal of 39954823 is 32845993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39954823 - 2⁵ = 39954791 is a prime.

It is a super-2 number, since 2×39954823² = 3192775761922658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39954823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39954829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19977411 + 19977412.

It is an arithmetic number, because the mean of its divisors is an integer number (19977412).

Almost surely, 2^39954823 is an apocalyptic number.

39954823 is a deficient number, since it is larger than the sum of its proper divisors (1).

39954823 is an equidigital number, since it uses as much as digits as its factorization.

39954823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 43.

The square root of 39954823 is about 6320.9827558695. The cubic root of 39954823 is about 341.8663881938.

The spelling of 39954823 in words is "thirty-nine million, nine hundred fifty-four thousand, eight hundred twenty-three".