1075773721 has 4 divisors (see below), whose sum is σ = 1173571344. Its totient is φ = 977976100.

The previous prime is 1075773691. The next prime is 1075773761. The reversal of 1075773721 is 1273775701.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1273775701 = 11 ⋅115797791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1075773721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1075773761) 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, 48898795 + ... + 48898816.

It is an arithmetic number, because the mean of its divisors is an integer number (293392836).

Almost surely, 2^1075773721 is an apocalyptic number.

1075773721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1075773721 is a deficient number, since it is larger than the sum of its proper divisors (97797623).

1075773721 is an equidigital number, since it uses as much as digits as its factorization.

1075773721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97797622.

The product of its (nonzero) digits is 72030, while the sum is 40.

The square root of 1075773721 is about 32798.9896338287. The cubic root of 1075773721 is about 1024.6455156510.

The spelling of 1075773721 in words is "one billion, seventy-five million, seven hundred seventy-three thousand, seven hundred twenty-one".