73687421 has 8 divisors (see below), whose sum is σ = 74908800. Its totient is φ = 72471280.

The previous prime is 73687417. The next prime is 73687429. The reversal of 73687421 is 12478637.

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 73687421 - 2² = 73687417 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 (73687429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35120 + ... + 37158.

It is an arithmetic number, because the mean of its divisors is an integer number (9363600).

Almost surely, 2^73687421 is an apocalyptic number.

73687421 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

73687421 is a deficient number, since it is larger than the sum of its proper divisors (1221379).

73687421 is a wasteful number, since it uses less digits than its factorization.

73687421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619.

The product of its digits is 56448, while the sum is 38.

The square root of 73687421 is about 8584.1377551854. The cubic root of 73687421 is about 419.2416796549.

The spelling of 73687421 in words is "seventy-three million, six hundred eighty-seven thousand, four hundred twenty-one".