1031427091 has 2 divisors, whose sum is σ = 1031427092. Its totient is φ = 1031427090.

The previous prime is 1031427031. The next prime is 1031427113. The reversal of 1031427091 is 1907241301.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031427091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1031427031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515713545 + 515713546.

It is an arithmetic number, because the mean of its divisors is an integer number (515713546).

Almost surely, 2^1031427091 is an apocalyptic number.

1031427091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031427091 is an equidigital number, since it uses as much as digits as its factorization.

1031427091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1031427091 is about 32115.8386314292. The cubic root of 1031427091 is about 1010.3678335414.

Adding to 1031427091 its reverse (1907241301), we get a palindrome (2938668392).

The spelling of 1031427091 in words is "one billion, thirty-one million, four hundred twenty-seven thousand, ninety-one".