31406047 has 2 divisors, whose sum is σ = 31406048. Its totient is φ = 31406046.

The previous prime is 31406029. The next prime is 31406059. The reversal of 31406047 is 74060413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31406047 - 2¹⁹ = 30881759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31406147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15703023 + 15703024.

It is an arithmetic number, because the mean of its divisors is an integer number (15703024).

Almost surely, 2^31406047 is an apocalyptic number.

31406047 is a deficient number, since it is larger than the sum of its proper divisors (1).

31406047 is an equidigital number, since it uses as much as digits as its factorization.

31406047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 31406047 is about 5604.1098311864. The cubic root of 31406047 is about 315.5036772803.

The spelling of 31406047 in words is "thirty-one million, four hundred six thousand, forty-seven".