39670091 has 4 divisors (see below), whose sum is σ = 39810552. Its totient is φ = 39529632.

The previous prime is 39670079. The next prime is 39670109. The reversal of 39670091 is 19007693.

39670091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19007693 = 47 ⋅404419.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39670091 is a prime.

It is a super-2 number, since 2×39670091² = 3147432239896562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39670051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69806 + ... + 70371.

It is an arithmetic number, because the mean of its divisors is an integer number (9952638).

Almost surely, 2^39670091 is an apocalyptic number.

39670091 is a deficient number, since it is larger than the sum of its proper divisors (140461).

39670091 is a wasteful number, since it uses less digits than its factorization.

39670091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140460.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 39670091 is about 6298.4197224383. The cubic root of 39670091 is about 341.0523650888.

The spelling of 39670091 in words is "thirty-nine million, six hundred seventy thousand, ninety-one".