418701649 has 2 divisors, whose sum is σ = 418701650. Its totient is φ = 418701648.

The previous prime is 418701629. The next prime is 418701671. The reversal of 418701649 is 946107814.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263250625 + 155451024 = 16225^2 + 12468^2 .

It is a cyclic number.

It is not a de Polignac number, because 418701649 - 2⁹ = 418701137 is a prime.

It is a super-2 number, since 2×418701649² = 350622141750638402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (418701629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209350824 + 209350825.

It is an arithmetic number, because the mean of its divisors is an integer number (209350825).

Almost surely, 2^418701649 is an apocalyptic number.

It is an amenable number.

418701649 is a deficient number, since it is larger than the sum of its proper divisors (1).

418701649 is an equidigital number, since it uses as much as digits as its factorization.

418701649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 418701649 is about 20462.2004926156. The cubic root of 418701649 is about 748.1147608387.

The spelling of 418701649 in words is "four hundred eighteen million, seven hundred one thousand, six hundred forty-nine".