39990827 has 4 divisors (see below), whose sum is σ = 40497120. Its totient is φ = 39484536.

The previous prime is 39990823. The next prime is 39990829. The reversal of 39990827 is 72809993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72809993 = 3779 ⋅19267.

It is a cyclic number.

It is not a de Polignac number, because 39990827 - 2² = 39990823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39990823) 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, 253028 + ... + 253185.

It is an arithmetic number, because the mean of its divisors is an integer number (10124280).

Almost surely, 2^39990827 is an apocalyptic number.

39990827 is a deficient number, since it is larger than the sum of its proper divisors (506293).

39990827 is an equidigital number, since it uses as much as digits as its factorization.

39990827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506292.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 39990827 is about 6323.8300894316. The cubic root of 39990827 is about 341.9690446544.

The spelling of 39990827 in words is "thirty-nine million, nine hundred ninety thousand, eight hundred twenty-seven".