1097971837 has 2 divisors, whose sum is σ = 1097971838. Its totient is φ = 1097971836.

The previous prime is 1097971793. The next prime is 1097971937. The reversal of 1097971837 is 7381797901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 579316761 + 518655076 = 24069^2 + 22774^2 .

It is a cyclic number.

It is not a de Polignac number, because 1097971837 - 2⁷ = 1097971709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1097971937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548985918 + 548985919.

It is an arithmetic number, because the mean of its divisors is an integer number (548985919).

Almost surely, 2^1097971837 is an apocalyptic number.

It is an amenable number.

1097971837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097971837 is an equidigital number, since it uses as much as digits as its factorization.

1097971837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792, while the sum is 52.

The square root of 1097971837 is about 33135.6580891341. The cubic root of 1097971837 is about 1031.6452910954.

The spelling of 1097971837 in words is "one billion, ninety-seven million, nine hundred seventy-one thousand, eight hundred thirty-seven".