391792097 has 4 divisors (see below), whose sum is σ = 408826560. Its totient is φ = 374757636.

The previous prime is 391792069. The next prime is 391792111. The reversal of 391792097 is 790297193.

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 391792097 - 2¹⁶ = 391726561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391792007) 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, 8517197 + ... + 8517242.

It is an arithmetic number, because the mean of its divisors is an integer number (102206640).

Almost surely, 2^391792097 is an apocalyptic number.

It is an amenable number.

391792097 is a deficient number, since it is larger than the sum of its proper divisors (17034463).

391792097 is a wasteful number, since it uses less digits than its factorization.

391792097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17034462.

The product of its (nonzero) digits is 214326, while the sum is 47.

The square root of 391792097 is about 19793.7388332776. The cubic root of 391792097 is about 731.7317346625.

The spelling of 391792097 in words is "three hundred ninety-one million, seven hundred ninety-two thousand, ninety-seven".