391125429787 has 4 divisors (see below), whose sum is σ = 408130883280. Its totient is φ = 374119976296.

The previous prime is 391125429767. The next prime is 391125429809. The reversal of 391125429787 is 787924521193.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 391125429787 - 2⁷ = 391125429659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391125429767) 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, 8502726712 + ... + 8502726757.

It is an arithmetic number, because the mean of its divisors is an integer number (102032720820).

Almost surely, 2^391125429787 is an apocalyptic number.

391125429787 is a deficient number, since it is larger than the sum of its proper divisors (17005453493).

391125429787 is a wasteful number, since it uses less digits than its factorization.

391125429787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17005453492.

The product of its digits is 7620480, while the sum is 58.

The spelling of 391125429787 in words is "three hundred ninety-one billion, one hundred twenty-five million, four hundred twenty-nine thousand, seven hundred eighty-seven".