867752881 has 4 divisors (see below), whose sum is σ = 869278500. Its totient is φ = 866227264.

The previous prime is 867752863. The next prime is 867752891. The reversal of 867752881 is 188257768.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 553896225 + 313856656 = 23535^2 + 17716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-867752881 is a prime.

It is a super-2 number, since 2×867752881² = 1505990124967600322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (867752801) 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, 761956 + ... + 763093.

It is an arithmetic number, because the mean of its divisors is an integer number (217319625).

Almost surely, 2^867752881 is an apocalyptic number.

It is an amenable number.

867752881 is a deficient number, since it is larger than the sum of its proper divisors (1525619).

867752881 is a wasteful number, since it uses less digits than its factorization.

867752881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525618.

The product of its digits is 1505280, while the sum is 52.

The square root of 867752881 is about 29457.6455440689. The cubic root of 867752881 is about 953.8176502924.

The spelling of 867752881 in words is "eight hundred sixty-seven million, seven hundred fifty-two thousand, eight hundred eighty-one".