867487749 has 4 divisors (see below), whose sum is σ = 1156650336. Its totient is φ = 578325164.

The previous prime is 867487739. The next prime is 867487763. The reversal of 867487749 is 947784768.

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 867487749 - 2⁸ = 867487493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 867487692 and 867487701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867487739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144581289 + ... + 144581294.

It is an arithmetic number, because the mean of its divisors is an integer number (289162584).

Almost surely, 2^867487749 is an apocalyptic number.

It is an amenable number.

867487749 is a deficient number, since it is larger than the sum of its proper divisors (289162587).

867487749 is a wasteful number, since it uses less digits than its factorization.

867487749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289162586.

The product of its digits is 18966528, while the sum is 60.

The square root of 867487749 is about 29453.1449763858. The cubic root of 867487749 is about 953.7204976941.

The spelling of 867487749 in words is "eight hundred sixty-seven million, four hundred eighty-seven thousand, seven hundred forty-nine".