420532649 has 2 divisors, whose sum is σ = 420532650. Its totient is φ = 420532648.

The previous prime is 420532627. The next prime is 420532661. The reversal of 420532649 is 946235024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 387814249 + 32718400 = 19693^2 + 5720^2 .

It is a cyclic number.

It is not a de Polignac number, because 420532649 - 2²⁸ = 152097193 is a prime.

It is not a weakly prime, because it can be changed into another prime (420532549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210266324 + 210266325.

It is an arithmetic number, because the mean of its divisors is an integer number (210266325).

Almost surely, 2^420532649 is an apocalyptic number.

It is an amenable number.

420532649 is a deficient number, since it is larger than the sum of its proper divisors (1).

420532649 is an equidigital number, since it uses as much as digits as its factorization.

420532649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 420532649 is about 20506.8927192786. The cubic root of 420532649 is about 749.2036875553.

The spelling of 420532649 in words is "four hundred twenty million, five hundred thirty-two thousand, six hundred forty-nine".