78031 has 2 divisors, whose sum is σ = 78032. Its totient is φ = 78030.

The previous prime is 78017. The next prime is 78041. The reversal of 78031 is 13087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78031 - 2⁵ = 77999 is a prime.

It is a super-2 number, since 2×78031² = 12177673922, which contains 22 as substring.

It is a nialpdrome in base 5 and base 7.

It is a zygodrome in base 5.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39015 + 39016.

It is an arithmetic number, because the mean of its divisors is an integer number (39016).

2⁷⁸⁰³¹ is an apocalyptic number.

78031 is a deficient number, since it is larger than the sum of its proper divisors (1).

78031 is an equidigital number, since it uses as much as digits as its factorization.

78031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 78031 is about 279.3402942649. The cubic root of 78031 is about 42.7322464271.

The spelling of 78031 in words is "seventy-eight thousand, thirty-one".