1075661797 has 4 divisors (see below), whose sum is σ = 1229327776. Its totient is φ = 921995820.

The previous prime is 1075661759. The next prime is 1075661827. The reversal of 1075661797 is 7971665701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1075661797 - 2²⁷ = 941444069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1075661797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1075661597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76832979 + ... + 76832992.

It is an arithmetic number, because the mean of its divisors is an integer number (307331944).

Almost surely, 2^1075661797 is an apocalyptic number.

It is an amenable number.

1075661797 is a deficient number, since it is larger than the sum of its proper divisors (153665979).

1075661797 is an equidigital number, since it uses as much as digits as its factorization.

1075661797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153665978.

The product of its (nonzero) digits is 555660, while the sum is 49.

The square root of 1075661797 is about 32797.2833783532. The cubic root of 1075661797 is about 1024.6099795527.

The spelling of 1075661797 in words is "one billion, seventy-five million, six hundred sixty-one thousand, seven hundred ninety-seven".