391069 has 12 divisors (see below), whose sum is σ = 476064. Its totient is φ = 319704.

The previous prime is 391067. The next prime is 391073. The reversal of 391069 is 960193.

It is a happy number.

It is not a de Polignac number, because 391069 - 2¹ = 391067 is a prime.

It is a super-2 number, since 2×391069² = 305869925522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 954 + ... + 1300.

It is an arithmetic number, because the mean of its divisors is an integer number (39672).

2³⁹¹⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

391069 is a deficient number, since it is larger than the sum of its proper divisors (84995).

391069 is a wasteful number, since it uses less digits than its factorization.

391069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 391069 is about 625.3550991237. The cubic root of 391069 is about 73.1281292644.

The spelling of 391069 in words is "three hundred ninety-one thousand, sixty-nine".