39955963 has 4 divisors (see below), whose sum is σ = 40070800. Its totient is φ = 39841128.

The previous prime is 39955961. The next prime is 39955973. The reversal of 39955963 is 36955993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36955993 = 647 ⋅57119.

It is a cyclic number.

It is not a de Polignac number, because 39955963 - 2¹ = 39955961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39955961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56895 + ... + 57592.

It is an arithmetic number, because the mean of its divisors is an integer number (10017700).

Almost surely, 2^39955963 is an apocalyptic number.

39955963 is a deficient number, since it is larger than the sum of its proper divisors (114837).

39955963 is a wasteful number, since it uses less digits than its factorization.

39955963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114836.

The product of its digits is 984150, while the sum is 49.

The square root of 39955963 is about 6321.0729310774. The cubic root of 39955963 is about 341.8696395658.

The spelling of 39955963 in words is "thirty-nine million, nine hundred fifty-five thousand, nine hundred sixty-three".