1356109771 has 4 divisors (see below), whose sum is σ = 1435880952. Its totient is φ = 1276338592.

The previous prime is 1356109763. The next prime is 1356109789. The reversal of 1356109771 is 1779016531.

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 1356109771 - 2³ = 1356109763 is a prime.

It is a super-2 number, since 2×1356109771² = 3678067422003344882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356109721) 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, 39885565 + ... + 39885598.

It is an arithmetic number, because the mean of its divisors is an integer number (358970238).

Almost surely, 2^1356109771 is an apocalyptic number.

1356109771 is a deficient number, since it is larger than the sum of its proper divisors (79771181).

1356109771 is an equidigital number, since it uses as much as digits as its factorization.

1356109771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79771180.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 1356109771 is about 36825.3957344656. The cubic root of 1356109771 is about 1106.8742435035.

The spelling of 1356109771 in words is "one billion, three hundred fifty-six million, one hundred nine thousand, seven hundred seventy-one".