39552991 has 8 divisors (see below), whose sum is σ = 41336064. Its totient is φ = 37809240.

The previous prime is 39552967. The next prime is 39553021. The reversal of 39552991 is 19925593.

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 39552991 - 2¹⁷ = 39421919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39552911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7765 + ... + 11806.

It is an arithmetic number, because the mean of its divisors is an integer number (5167008).

Almost surely, 2^39552991 is an apocalyptic number.

39552991 is a deficient number, since it is larger than the sum of its proper divisors (1783073).

39552991 is a wasteful number, since it uses less digits than its factorization.

39552991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19661.

The product of its digits is 109350, while the sum is 43.

The square root of 39552991 is about 6289.1168696408. The cubic root of 39552991 is about 340.7164563332.

The spelling of 39552991 in words is "thirty-nine million, five hundred fifty-two thousand, nine hundred ninety-one".