1191264097 has 2 divisors, whose sum is σ = 1191264098. Its totient is φ = 1191264096.

The previous prime is 1191264091. The next prime is 1191264119. The reversal of 1191264097 is 7904621911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 944271441 + 246992656 = 30729^2 + 15716^2 .

It is a cyclic number.

It is not a de Polignac number, because 1191264097 - 2²³ = 1182875489 is a prime.

It is a super-2 number, since 2×1191264097² = 2838220297602450818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1191264091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595632048 + 595632049.

It is an arithmetic number, because the mean of its divisors is an integer number (595632049).

Almost surely, 2^1191264097 is an apocalyptic number.

It is an amenable number.

1191264097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191264097 is an equidigital number, since it uses as much as digits as its factorization.

1191264097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1191264097 is about 34514.6939288182. The cubic root of 1191264097 is about 1060.0735967056.

The spelling of 1191264097 in words is "one billion, one hundred ninety-one million, two hundred sixty-four thousand, ninety-seven".