2067991397 has 8 divisors (see below), whose sum is σ = 2094011136. Its totient is φ = 2041998112.

The previous prime is 2067991361. The next prime is 2067991411. The reversal of 2067991397 is 7931997602.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2067991397 - 2¹⁰ = 2067990373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2067991327) 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, 185228 + ... + 196074.

It is an arithmetic number, because the mean of its divisors is an integer number (261751392).

Almost surely, 2^2067991397 is an apocalyptic number.

It is an amenable number.

2067991397 is a deficient number, since it is larger than the sum of its proper divisors (26019739).

2067991397 is a wasteful number, since it uses less digits than its factorization.

2067991397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13227.

The product of its (nonzero) digits is 1285956, while the sum is 53.

The square root of 2067991397 is about 45475.1734136331. The cubic root of 2067991397 is about 1274.0395477522.

The spelling of 2067991397 in words is "two billion, sixty-seven million, nine hundred ninety-one thousand, three hundred ninety-seven".