31094381 has 2 divisors, whose sum is σ = 31094382. Its totient is φ = 31094380.

The previous prime is 31094341. The next prime is 31094383. The reversal of 31094381 is 18349013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30625156 + 469225 = 5534^2 + 685^2 .

It is a cyclic number.

It is not a de Polignac number, because 31094381 - 2¹⁴ = 31077997 is a prime.

It is a super-2 number, since 2×31094381² = 1933721059546322, which contains 22 as substring.

Together with 31094383, 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 (31094383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15547190 + 15547191.

It is an arithmetic number, because the mean of its divisors is an integer number (15547191).

Almost surely, 2^31094381 is an apocalyptic number.

It is an amenable number.

31094381 is a deficient number, since it is larger than the sum of its proper divisors (1).

31094381 is an equidigital number, since it uses as much as digits as its factorization.

31094381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 31094381 is about 5576.2335854948. The cubic root of 31094381 is about 314.4565450950.

The spelling of 31094381 in words is "thirty-one million, ninety-four thousand, three hundred eighty-one".