73420505 has 8 divisors (see below), whose sum is σ = 88368072. Its totient is φ = 58560768.

The previous prime is 73420483. The next prime is 73420513. The reversal of 73420505 is 50502437.

It can be written as a sum of positive squares in 4 ways, for example, as 1713481 + 71707024 = 1309^2 + 8468^2 .

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 73420505 - 2⁶ = 73420441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20102 + ... + 23471.

It is an arithmetic number, because the mean of its divisors is an integer number (11046009).

Almost surely, 2^73420505 is an apocalyptic number.

It is an amenable number.

73420505 is a deficient number, since it is larger than the sum of its proper divisors (14947567).

73420505 is a wasteful number, since it uses less digits than its factorization.

73420505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43915.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 73420505 is about 8568.5766029137. The cubic root of 73420505 is about 418.7348645305.

The spelling of 73420505 in words is "seventy-three million, four hundred twenty thousand, five hundred five".