80421737 has 16 divisors (see below), whose sum is σ = 92664000. Its totient is φ = 69027840.

The previous prime is 80421709. The next prime is 80421743. The reversal of 80421737 is 73712408.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 80421737 - 2⁶ = 80421673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80421797) 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 15 ways as a sum of consecutive naturals, for example, 93413 + ... + 94269.

It is an arithmetic number, because the mean of its divisors is an integer number (5791500).

Almost surely, 2^80421737 is an apocalyptic number.

It is an amenable number.

80421737 is a deficient number, since it is larger than the sum of its proper divisors (12242263).

80421737 is a wasteful number, since it uses less digits than its factorization.

80421737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 80421737 is about 8967.8167354156. The cubic root of 80421737 is about 431.6427820465.

It can be divided in two parts, 8042 and 1737, that added together give a palindrome (9779).

The spelling of 80421737 in words is "eighty million, four hundred twenty-one thousand, seven hundred thirty-seven".