873121651 has 4 divisors (see below), whose sum is σ = 873300904. Its totient is φ = 872942400.

The previous prime is 873121637. The next prime is 873121663. The reversal of 873121651 is 156121378.

It is a happy number.

873121651 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.

It is a cyclic number.

It is not a de Polignac number, because 873121651 - 2⁵ = 873121619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (873121631) 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, 82110 + ... + 92131.

It is an arithmetic number, because the mean of its divisors is an integer number (218325226).

Almost surely, 2^873121651 is an apocalyptic number.

873121651 is a deficient number, since it is larger than the sum of its proper divisors (179253).

873121651 is a wasteful number, since it uses less digits than its factorization.

873121651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179252.

The product of its digits is 10080, while the sum is 34.

The square root of 873121651 is about 29548.6319649489. The cubic root of 873121651 is about 955.7806910878.

The spelling of 873121651 in words is "eight hundred seventy-three million, one hundred twenty-one thousand, six hundred fifty-one".