73891129 has 8 divisors (see below), whose sum is σ = 84256200. Its totient is φ = 64194816.

The previous prime is 73891123. The next prime is 73891141. The reversal of 73891129 is 92119837.

It can be written as a sum of positive squares in 4 ways, for example, as 2319529 + 71571600 = 1523^2 + 8460^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73891129 - 2³ = 73891121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73891091 and 73891100.

It is not an unprimeable number, because it can be changed into a prime (73891121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166954 + ... + 167395.

It is an arithmetic number, because the mean of its divisors is an integer number (10532025).

Almost surely, 2^73891129 is an apocalyptic number.

It is an amenable number.

73891129 is a deficient number, since it is larger than the sum of its proper divisors (10365071).

73891129 is a wasteful number, since it uses less digits than its factorization.

73891129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334379.

The product of its digits is 27216, while the sum is 40.

The square root of 73891129 is about 8595.9949395053. The cubic root of 73891129 is about 419.6276537472.

The spelling of 73891129 in words is "seventy-three million, eight hundred ninety-one thousand, one hundred twenty-nine".