971061091 has 16 divisors (see below), whose sum is σ = 1303803648. Its totient is φ = 698464800.

The previous prime is 971061023. The next prime is 971061121. The reversal of 971061091 is 190160179.

It is not a de Polignac number, because 971061091 - 2⁷ = 971060963 is a prime.

It is a super-2 number, since 2×971061091² = 1885919284908220562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (971061001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484045 + ... + 486046.

It is an arithmetic number, because the mean of its divisors is an integer number (81487728).

Almost surely, 2^971061091 is an apocalyptic number.

971061091 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

971061091 is a deficient number, since it is larger than the sum of its proper divisors (332742557).

971061091 is a wasteful number, since it uses less digits than its factorization.

971061091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970122.

The product of its (nonzero) digits is 3402, while the sum is 34.

The square root of 971061091 is about 31161.8531380918. The cubic root of 971061091 is about 990.2591203506.

The spelling of 971061091 in words is "nine hundred seventy-one million, sixty-one thousand, ninety-one".