73998513 has 6 divisors (see below), whose sum is σ = 106886754. Its totient is φ = 49332336.

The previous prime is 73998497. The next prime is 73998523. The reversal of 73998513 is 31589937.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 37601424 + 36397089 = 6132^2 + 6033^2 .

It is not a de Polignac number, because 73998513 - 2⁴ = 73998497 is a prime.

It is a super-2 number, since 2×73998513² = 10951559852422338, 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 (73998523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4111020 + ... + 4111037.

It is an arithmetic number, because the mean of its divisors is an integer number (17814459).

Almost surely, 2^73998513 is an apocalyptic number.

It is an amenable number.

73998513 is a deficient number, since it is larger than the sum of its proper divisors (32888241).

73998513 is a wasteful number, since it uses less digits than its factorization.

73998513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8222063 (or 8222060 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 73998513 is about 8602.2388364890. The cubic root of 73998513 is about 419.8308332330.

The spelling of 73998513 in words is "seventy-three million, nine hundred ninety-eight thousand, five hundred thirteen".