80021407 has 4 divisors (see below), whose sum is σ = 84233080. Its totient is φ = 75809736.

The previous prime is 80021387. The next prime is 80021437. The reversal of 80021407 is 70412008.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80021407 is a prime.

It is a super-3 number, since 3×80021407³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80021437) 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, 2105808 + ... + 2105845.

It is an arithmetic number, because the mean of its divisors is an integer number (21058270).

Almost surely, 2^80021407 is an apocalyptic number.

80021407 is a deficient number, since it is larger than the sum of its proper divisors (4211673).

80021407 is a wasteful number, since it uses less digits than its factorization.

80021407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211672.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 80021407 is about 8945.4685176351. The cubic root of 80021407 is about 430.9253678983.

It can be divided in two parts, 8002 and 1407, that added together give a square (9409 = 97²).

The spelling of 80021407 in words is "eighty million, twenty-one thousand, four hundred seven".