80937421 has 2 divisors, whose sum is σ = 80937422. Its totient is φ = 80937420.

The previous prime is 80937379. The next prime is 80937449. The reversal of 80937421 is 12473908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80748196 + 189225 = 8986^2 + 435^2 .

It is a cyclic number.

It is not a de Polignac number, because 80937421 - 2⁷ = 80937293 is a prime.

It is a super-2 number, since 2×80937421² = 13101732236262482, which contains 22 as substring.

It is equal to p_4720957 and since 80937421 and 4720957 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80937821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40468710 + 40468711.

It is an arithmetic number, because the mean of its divisors is an integer number (40468711).

Almost surely, 2^80937421 is an apocalyptic number.

It is an amenable number.

80937421 is a deficient number, since it is larger than the sum of its proper divisors (1).

80937421 is an equidigital number, since it uses as much as digits as its factorization.

80937421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 80937421 is about 8996.5227171391. The cubic root of 80937421 is about 432.5634170320.

The spelling of 80937421 in words is "eighty million, nine hundred thirty-seven thousand, four hundred twenty-one".