1161537547 has 2 divisors, whose sum is σ = 1161537548. Its totient is φ = 1161537546.

The previous prime is 1161537541. The next prime is 1161537557. The reversal of 1161537547 is 7457351611.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161537547 is a prime.

It is a super-3 number, since 3×1161537547³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1161537541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580768773 + 580768774.

It is an arithmetic number, because the mean of its divisors is an integer number (580768774).

Almost surely, 2^1161537547 is an apocalyptic number.

1161537547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161537547 is an equidigital number, since it uses as much as digits as its factorization.

1161537547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 40.

The square root of 1161537547 is about 34081.3372243520. The cubic root of 1161537547 is about 1051.1816016253.

It can be divided in two parts, 1161537 and 547, that added together give a square (1162084 = 1078²).

The spelling of 1161537547 in words is "one billion, one hundred sixty-one million, five hundred thirty-seven thousand, five hundred forty-seven".