39969955 has 8 divisors (see below), whose sum is σ = 47999952. Its totient is φ = 31951968.

The previous prime is 39969949. The next prime is 39969959. The reversal of 39969955 is 55996993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39969955 - 2⁷ = 39969827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39969896 and 39969905.

It is not an unprimeable number, because it can be changed into a prime (39969959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7984 + ... + 11986.

It is an arithmetic number, because the mean of its divisors is an integer number (5999994).

Almost surely, 2^39969955 is an apocalyptic number.

39969955 is a deficient number, since it is larger than the sum of its proper divisors (8029997).

39969955 is a wasteful number, since it uses less digits than its factorization.

39969955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6005.

The product of its digits is 2952450, while the sum is 55.

The square root of 39969955 is about 6322.1796083313. The cubic root of 39969955 is about 341.9095408420.

The spelling of 39969955 in words is "thirty-nine million, nine hundred sixty-nine thousand, nine hundred fifty-five".