1031019491 has 2 divisors, whose sum is σ = 1031019492. Its totient is φ = 1031019490.

The previous prime is 1031019481. The next prime is 1031019503. The reversal of 1031019491 is 1949101301.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1031019491 - 2⁶ = 1031019427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1031019481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515509745 + 515509746.

It is an arithmetic number, because the mean of its divisors is an integer number (515509746).

Almost surely, 2^1031019491 is an apocalyptic number.

1031019491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031019491 is an equidigital number, since it uses as much as digits as its factorization.

1031019491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 1031019491 is about 32109.4922258201. The cubic root of 1031019491 is about 1010.2347234091.

The spelling of 1031019491 in words is "one billion, thirty-one million, nineteen thousand, four hundred ninety-one".