1097645747 has 4 divisors (see below), whose sum is σ = 1197431736. Its totient is φ = 997859760.

The previous prime is 1097645723. The next prime is 1097645761. The reversal of 1097645747 is 7475467901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1097645747 - 2¹⁴ = 1097629363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1097645695 and 1097645704.

It is not an unprimeable number, because it can be changed into a prime (1097645707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49892978 + ... + 49892999.

It is an arithmetic number, because the mean of its divisors is an integer number (299357934).

Almost surely, 2^1097645747 is an apocalyptic number.

1097645747 is a deficient number, since it is larger than the sum of its proper divisors (99785989).

1097645747 is an equidigital number, since it uses as much as digits as its factorization.

1097645747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99785988.

The product of its (nonzero) digits is 1481760, while the sum is 50.

The square root of 1097645747 is about 33130.7371937299. The cubic root of 1097645747 is about 1031.5431504907.

It can be divided in two parts, 109764 and 5747, that added together give a palindrome (115511).

The spelling of 1097645747 in words is "one billion, ninety-seven million, six hundred forty-five thousand, seven hundred forty-seven".