39129901 has 4 divisors (see below), whose sum is σ = 39217500. Its totient is φ = 39042304.

The previous prime is 39129889. The next prime is 39129919. The reversal of 39129901 is 10992193.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15217801 + 23912100 = 3901^2 + 4890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39129901 is a prime.

It is a super-2 number, since 2×39129901² = 3062298304539602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39129931) 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, 43126 + ... + 44023.

It is an arithmetic number, because the mean of its divisors is an integer number (9804375).

Almost surely, 2^39129901 is an apocalyptic number.

It is an amenable number.

39129901 is a deficient number, since it is larger than the sum of its proper divisors (87599).

39129901 is an equidigital number, since it uses as much as digits as its factorization.

39129901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87598.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 39129901 is about 6255.3897560424. The cubic root of 39129901 is about 339.4972413654.

The spelling of 39129901 in words is "thirty-nine million, one hundred twenty-nine thousand, nine hundred one".