1097988971 has 2 divisors, whose sum is σ = 1097988972. Its totient is φ = 1097988970.

The previous prime is 1097988917. The next prime is 1097989001. The reversal of 1097988971 is 1798897901.

Together with previous prime (1097988917) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1097988971 - 2³⁰ = 24247147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1097988971.

It is not a weakly prime, because it can be changed into another prime (1097988901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548994485 + 548994486.

It is an arithmetic number, because the mean of its divisors is an integer number (548994486).

Almost surely, 2^1097988971 is an apocalyptic number.

1097988971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097988971 is an equidigital number, since it uses as much as digits as its factorization.

1097988971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 59.

The square root of 1097988971 is about 33135.9166313534. The cubic root of 1097988971 is about 1031.6506573893.

The spelling of 1097988971 in words is "one billion, ninety-seven million, nine hundred eighty-eight thousand, nine hundred seventy-one".