1129198541 has 2 divisors, whose sum is σ = 1129198542. Its totient is φ = 1129198540.

The previous prime is 1129198537. The next prime is 1129198573. The reversal of 1129198541 is 1458919211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 954192100 + 175006441 = 30890^2 + 13229^2 .

It is a cyclic number.

It is not a de Polignac number, because 1129198541 - 2² = 1129198537 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1129198141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564599270 + 564599271.

It is an arithmetic number, because the mean of its divisors is an integer number (564599271).

Almost surely, 2^1129198541 is an apocalyptic number.

It is an amenable number.

1129198541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129198541 is an equidigital number, since it uses as much as digits as its factorization.

1129198541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 41.

The square root of 1129198541 is about 33603.5495297744. The cubic root of 1129198541 is about 1041.3341300936.

The spelling of 1129198541 in words is "one billion, one hundred twenty-nine million, one hundred ninety-eight thousand, five hundred forty-one".