391390400029 has 4 divisors (see below), whose sum is σ = 391676714784. Its totient is φ = 391104085276.

The previous prime is 391390400021. The next prime is 391390400033. The reversal of 391390400029 is 920004093193.

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 391390400029 - 2³ = 391390400021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 391390399964 and 391390400000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391390400021) 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, 143155327 + ... + 143158060.

It is an arithmetic number, because the mean of its divisors is an integer number (97919178696).

Almost surely, 2^391390400029 is an apocalyptic number.

It is an amenable number.

391390400029 is a deficient number, since it is larger than the sum of its proper divisors (286314755).

391390400029 is a wasteful number, since it uses less digits than its factorization.

391390400029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286314754.

The product of its (nonzero) digits is 52488, while the sum is 40.

The spelling of 391390400029 in words is "three hundred ninety-one billion, three hundred ninety million, four hundred thousand, twenty-nine".