39121897 has 8 divisors (see below), whose sum is σ = 40538880. Its totient is φ = 37730160.

The previous prime is 39121891. The next prime is 39121909. The reversal of 39121897 is 79812193.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39121897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39121891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3129 + ... + 9382.

It is an arithmetic number, because the mean of its divisors is an integer number (5067360).

Almost surely, 2^39121897 is an apocalyptic number.

It is an amenable number.

39121897 is a deficient number, since it is larger than the sum of its proper divisors (1416983).

39121897 is a wasteful number, since it uses less digits than its factorization.

39121897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12623.

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

The square root of 39121897 is about 6254.7499550342. The cubic root of 39121897 is about 339.4740917948.

The spelling of 39121897 in words is "thirty-nine million, one hundred twenty-one thousand, eight hundred ninety-seven".