423680437 has 2 divisors, whose sum is σ = 423680438. Its totient is φ = 423680436.

The previous prime is 423680423. The next prime is 423680461. The reversal of 423680437 is 734086324.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322597521 + 101082916 = 17961^2 + 10054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423680437 is a prime.

It is a super-2 number, since 2×423680437² = 359010225393021938, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 423680396 and 423680405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423680497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211840218 + 211840219.

It is an arithmetic number, because the mean of its divisors is an integer number (211840219).

Almost surely, 2^423680437 is an apocalyptic number.

It is an amenable number.

423680437 is a deficient number, since it is larger than the sum of its proper divisors (1).

423680437 is an equidigital number, since it uses as much as digits as its factorization.

423680437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 423680437 is about 20583.4991437316. The cubic root of 423680437 is about 751.0683659954.

The spelling of 423680437 in words is "four hundred twenty-three million, six hundred eighty thousand, four hundred thirty-seven".