872639349 has 4 divisors (see below), whose sum is σ = 1163519136. Its totient is φ = 581759564.

The previous prime is 872639333. The next prime is 872639351. The reversal of 872639349 is 943936278.

872639349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 872639349 - 2⁴ = 872639333 is a prime.

It is a super-2 number, since 2×872639349² = 1522998866846287602, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872639399) 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, 145439889 + ... + 145439894.

It is an arithmetic number, because the mean of its divisors is an integer number (290879784).

Almost surely, 2^872639349 is an apocalyptic number.

It is an amenable number.

872639349 is a deficient number, since it is larger than the sum of its proper divisors (290879787).

872639349 is a wasteful number, since it uses less digits than its factorization.

872639349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290879786.

The product of its digits is 1959552, while the sum is 51.

The square root of 872639349 is about 29540.4696814387. The cubic root of 872639349 is about 955.6046713837.

The spelling of 872639349 in words is "eight hundred seventy-two million, six hundred thirty-nine thousand, three hundred forty-nine".