39789121 has 4 divisors (see below), whose sum is σ = 40268592. Its totient is φ = 39309652.

The previous prime is 39789077. The next prime is 39789143. The reversal of 39789121 is 12198793.

39789121 = T₁₂₄ + T₁₂₅ + ... + T₆₂₁.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39789121 is a prime.

It is a super-3 number, since 3×39789121³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39789821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239611 + ... + 239776.

It is an arithmetic number, because the mean of its divisors is an integer number (10067148).

Almost surely, 2^39789121 is an apocalyptic number.

It is an amenable number.

39789121 is a deficient number, since it is larger than the sum of its proper divisors (479471).

39789121 is an equidigital number, since it uses as much as digits as its factorization.

39789121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479470.

The product of its digits is 27216, while the sum is 40.

The square root of 39789121 is about 6307.8618405923. The cubic root of 39789121 is about 341.3931333885.

The spelling of 39789121 in words is "thirty-nine million, seven hundred eighty-nine thousand, one hundred twenty-one".