1791612397 has 4 divisors (see below), whose sum is σ = 1797448576. Its totient is φ = 1785776220.

The previous prime is 1791612377. The next prime is 1791612413. The reversal of 1791612397 is 7932161971.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1791612397 - 2¹¹ = 1791610349 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 (1791612377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2917629 + ... + 2918242.

It is an arithmetic number, because the mean of its divisors is an integer number (449362144).

Almost surely, 2^1791612397 is an apocalyptic number.

It is an amenable number.

1791612397 is a deficient number, since it is larger than the sum of its proper divisors (5836179).

1791612397 is an equidigital number, since it uses as much as digits as its factorization.

1791612397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5836178.

The product of its digits is 142884, while the sum is 46.

The square root of 1791612397 is about 42327.4425993350. The cubic root of 1791612397 is about 1214.5480087008.

The spelling of 1791612397 in words is "one billion, seven hundred ninety-one million, six hundred twelve thousand, three hundred ninety-seven".