73129690 has 8 divisors (see below), whose sum is σ = 131633460. Its totient is φ = 29251872.

The previous prime is 73129669. The next prime is 73129703. The reversal of 73129690 is 9692137.

It can be written as a sum of positive squares in 2 ways, for example, as 60047001 + 13082689 = 7749^2 + 3617^2 .

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

It is a super-2 number, since 2×73129690² = 10695903118992200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3656475 + ... + 3656494.

Almost surely, 2^73129690 is an apocalyptic number.

73129690 is a deficient number, since it is larger than the sum of its proper divisors (58503770).

73129690 is a wasteful number, since it uses less digits than its factorization.

73129690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7312976.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 73129690 is about 8551.5899106540. The cubic root of 73129690 is about 418.1812702490.

The spelling of 73129690 in words is "seventy-three million, one hundred twenty-nine thousand, six hundred ninety".