406651001 has 2 divisors, whose sum is σ = 406651002. Its totient is φ = 406651000.

The previous prime is 406650983. The next prime is 406651061. The reversal of 406651001 is 100156604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 365383225 + 41267776 = 19115^2 + 6424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406651001 is a prime.

It is a super-2 number, since 2×406651001² = 330730073228604002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (406651061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203325500 + 203325501.

It is an arithmetic number, because the mean of its divisors is an integer number (203325501).

Almost surely, 2^406651001 is an apocalyptic number.

It is an amenable number.

406651001 is a deficient number, since it is larger than the sum of its proper divisors (1).

406651001 is an equidigital number, since it uses as much as digits as its factorization.

406651001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 406651001 is about 20165.5895277078. The cubic root of 406651001 is about 740.8676218667.

The spelling of 406651001 in words is "four hundred six million, six hundred fifty-one thousand, one".