421992007 has 2 divisors, whose sum is σ = 421992008. Its totient is φ = 421992006.

The previous prime is 421991953. The next prime is 421992019. The reversal of 421992007 is 700299124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421992007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421992407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210996003 + 210996004.

It is an arithmetic number, because the mean of its divisors is an integer number (210996004).

Almost surely, 2^421992007 is an apocalyptic number.

421992007 is a deficient number, since it is larger than the sum of its proper divisors (1).

421992007 is an equidigital number, since it uses as much as digits as its factorization.

421992007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 421992007 is about 20542.4440366768. Note that the first 3 decimals coincide. The cubic root of 421992007 is about 750.0693310722.

The spelling of 421992007 in words is "four hundred twenty-one million, nine hundred ninety-two thousand, seven".