1061481391 has 2 divisors, whose sum is σ = 1061481392. Its totient is φ = 1061481390.

The previous prime is 1061481389. The next prime is 1061481401. The reversal of 1061481391 is 1931841601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1061481391 - 2¹ = 1061481389 is a prime.

It is a super-2 number, since 2×1061481391² = 2253485486878589762, which contains 22 as substring.

Together with 1061481389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1061481361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530740695 + 530740696.

It is an arithmetic number, because the mean of its divisors is an integer number (530740696).

Almost surely, 2^1061481391 is an apocalyptic number.

1061481391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061481391 is an equidigital number, since it uses as much as digits as its factorization.

1061481391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1061481391 is about 32580.3835305848. The cubic root of 1061481391 is about 1020.0875841106.

The spelling of 1061481391 in words is "one billion, sixty-one million, four hundred eighty-one thousand, three hundred ninety-one".