31401079 has 2 divisors, whose sum is σ = 31401080. Its totient is φ = 31401078.

The previous prime is 31401077. The next prime is 31401101. The reversal of 31401079 is 97010413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31401079 - 2¹ = 31401077 is a prime.

Together with 31401077, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31401077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700539 + 15700540.

It is an arithmetic number, because the mean of its divisors is an integer number (15700540).

Almost surely, 2^31401079 is an apocalyptic number.

31401079 is a deficient number, since it is larger than the sum of its proper divisors (1).

31401079 is an equidigital number, since it uses as much as digits as its factorization.

31401079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 31401079 is about 5603.6665675252. Note that the first 3 decimals coincide. The cubic root of 31401079 is about 315.4870403046.

The spelling of 31401079 in words is "thirty-one million, four hundred one thousand, seventy-nine".