1153777897 has 4 divisors (see below), whose sum is σ = 1164560976. Its totient is φ = 1142994820.

The previous prime is 1153777883. The next prime is 1153777901. The reversal of 1153777897 is 7987773511.

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 1153777897 - 2⁷ = 1153777769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1153777817) 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, 5391379 + ... + 5391592.

It is an arithmetic number, because the mean of its divisors is an integer number (291140244).

Almost surely, 2^1153777897 is an apocalyptic number.

It is an amenable number.

1153777897 is a deficient number, since it is larger than the sum of its proper divisors (10783079).

1153777897 is a wasteful number, since it uses less digits than its factorization.

1153777897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10783078.

The product of its digits is 2593080, while the sum is 55.

The square root of 1153777897 is about 33967.3062959075. The cubic root of 1153777897 is about 1048.8355638572.

The spelling of 1153777897 in words is "one billion, one hundred fifty-three million, seven hundred seventy-seven thousand, eight hundred ninety-seven".