73900613 has 4 divisors (see below), whose sum is σ = 76448940. Its totient is φ = 71352288.

The previous prime is 73900609. The next prime is 73900657. The reversal of 73900613 is 31600937.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31600937 = 4339 ⋅7283.

It can be written as a sum of positive squares in 2 ways, for example, as 46881409 + 27019204 = 6847^2 + 5198^2 .

It is a cyclic number.

It is not a de Polignac number, because 73900613 - 2² = 73900609 is a prime.

It is a super-2 number, since 2×73900613² = 10922601203551538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 2548297 = 73900613 / (7 + 3 + 9 + 0 + 0 + 6 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73900693) 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, 1274120 + ... + 1274177.

It is an arithmetic number, because the mean of its divisors is an integer number (19112235).

Almost surely, 2^73900613 is an apocalyptic number.

It is an amenable number.

73900613 is a deficient number, since it is larger than the sum of its proper divisors (2548327).

73900613 is a wasteful number, since it uses less digits than its factorization.

73900613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548326.

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 73900613 is about 8596.5465740610. The cubic root of 73900613 is about 419.6456061883.

The spelling of 73900613 in words is "seventy-three million, nine hundred thousand, six hundred thirteen".