31140407 has 2 divisors, whose sum is σ = 31140408. Its totient is φ = 31140406.

The previous prime is 31140401. The next prime is 31140409. The reversal of 31140407 is 70404113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31140407 - 2⁴ = 31140391 is a prime.

Together with 31140409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31140401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15570203 + 15570204.

It is an arithmetic number, because the mean of its divisors is an integer number (15570204).

Almost surely, 2^31140407 is an apocalyptic number.

31140407 is a deficient number, since it is larger than the sum of its proper divisors (1).

31140407 is an equidigital number, since it uses as much as digits as its factorization.

31140407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 31140407 is about 5580.3590386282. The cubic root of 31140407 is about 314.6116217923.

The spelling of 31140407 in words is "thirty-one million, one hundred forty thousand, four hundred seven".