73390421 has 8 divisors (see below), whose sum is σ = 79134720. Its totient is φ = 67660272.

The previous prime is 73390409. The next prime is 73390507. The reversal of 73390421 is 12409337.

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 73390421 - 2¹⁰ = 73389397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73390021) 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, 8876 + ... + 15018.

It is an arithmetic number, because the mean of its divisors is an integer number (9891840).

Almost surely, 2^73390421 is an apocalyptic number.

It is an amenable number.

73390421 is a deficient number, since it is larger than the sum of its proper divisors (5744299).

73390421 is a wasteful number, since it uses less digits than its factorization.

73390421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7075.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 73390421 is about 8566.8209389481. The cubic root of 73390421 is about 418.6776646124.

Adding to 73390421 its reverse (12409337), we get a palindrome (85799758).

The spelling of 73390421 in words is "seventy-three million, three hundred ninety thousand, four hundred twenty-one".