391214039 has 4 divisors (see below), whose sum is σ = 391350624. Its totient is φ = 391077456.

The previous prime is 391214027. The next prime is 391214059. The reversal of 391214039 is 930412193.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930412193 = 17 ⋅54730129.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391214039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 391213996 and 391214014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391214059) 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, 63902 + ... + 69755.

It is an arithmetic number, because the mean of its divisors is an integer number (97837656).

Almost surely, 2^391214039 is an apocalyptic number.

391214039 is a deficient number, since it is larger than the sum of its proper divisors (136585).

391214039 is a wasteful number, since it uses less digits than its factorization.

391214039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136584.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 391214039 is about 19779.1314015555. The cubic root of 391214039 is about 731.3716869202.

The spelling of 391214039 in words is "three hundred ninety-one million, two hundred fourteen thousand, thirty-nine".