1157072197 has 2 divisors, whose sum is σ = 1157072198. Its totient is φ = 1157072196.

The previous prime is 1157072183. The next prime is 1157072221. The reversal of 1157072197 is 7912707511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 922093956 + 234978241 = 30366^2 + 15329^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157072197 - 2¹¹ = 1157070149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157072107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578536098 + 578536099.

It is an arithmetic number, because the mean of its divisors is an integer number (578536099).

Almost surely, 2^1157072197 is an apocalyptic number.

It is an amenable number.

1157072197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157072197 is an equidigital number, since it uses as much as digits as its factorization.

1157072197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30870, while the sum is 40.

The square root of 1157072197 is about 34015.7639484989. The cubic root of 1157072197 is about 1049.8328371831.

The spelling of 1157072197 in words is "one billion, one hundred fifty-seven million, seventy-two thousand, one hundred ninety-seven".