831407 has 2 divisors, whose sum is σ = 831408. Its totient is φ = 831406.

The previous prime is 831373. The next prime is 831409. The reversal of 831407 is 704138.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 831407 - 2¹⁰ = 830383 is a prime.

Together with 831409, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (831409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415703 + 415704.

It is an arithmetic number, because the mean of its divisors is an integer number (415704).

2⁸³¹⁴⁰⁷ is an apocalyptic number.

831407 is a deficient number, since it is larger than the sum of its proper divisors (1).

831407 is an equidigital number, since it uses as much as digits as its factorization.

831407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 831407 is about 911.8152225095. The cubic root of 831407 is about 94.0310369821.

The spelling of 831407 in words is "eight hundred thirty-one thousand, four hundred seven".