39429081 has 6 divisors (see below), whose sum is σ = 56953130. Its totient is φ = 26286048.

The previous prime is 39429079. The next prime is 39429083. The reversal of 39429081 is 18092493.

It is an interprime number because it is at equal distance from previous prime (39429079) and next prime (39429083).

It can be written as a sum of positive squares in only one way, i.e., 25857225 + 13571856 = 5085^2 + 3684^2 .

It is not a de Polignac number, because 39429081 - 2¹ = 39429079 is a prime.

It is a super-2 number, since 2×39429081² = 3109304857009122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39429083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2190496 + ... + 2190513.

Almost surely, 2^39429081 is an apocalyptic number.

It is an amenable number.

39429081 is a deficient number, since it is larger than the sum of its proper divisors (17524049).

39429081 is a wasteful number, since it uses less digits than its factorization.

39429081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381015 (or 4381012 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 39429081 is about 6279.2579975663. The cubic root of 39429081 is about 340.3602899314.

The spelling of 39429081 in words is "thirty-nine million, four hundred twenty-nine thousand, eighty-one".