39970109 has 4 divisors (see below), whose sum is σ = 40724316. Its totient is φ = 39215904.

The previous prime is 39970103. The next prime is 39970141. The reversal of 39970109 is 90107993.

It is a happy number.

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 36264484 + 3705625 = 6022^2 + 1925^2 .

It is a cyclic number.

It is not a de Polignac number, because 39970109 - 2¹² = 39966013 is a prime.

It is a super-2 number, since 2×39970109² = 3195219226943762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39970103) 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, 377024 + ... + 377129.

It is an arithmetic number, because the mean of its divisors is an integer number (10181079).

Almost surely, 2^39970109 is an apocalyptic number.

It is an amenable number.

39970109 is a deficient number, since it is larger than the sum of its proper divisors (754207).

39970109 is an equidigital number, since it uses as much as digits as its factorization.

39970109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754206.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 39970109 is about 6322.1917876635. The cubic root of 39970109 is about 341.9099799552.

The spelling of 39970109 in words is "thirty-nine million, nine hundred seventy thousand, one hundred nine".