418724989 has 4 divisors (see below), whose sum is σ = 419415424. Its totient is φ = 418034556.

The previous prime is 418724953. The next prime is 418725017. The reversal of 418724989 is 989427814.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989427814 = 2 ⋅494713907.

It is a cyclic number.

It is not a de Polignac number, because 418724989 - 2⁹ = 418724477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (418724389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344307 + ... + 345520.

It is an arithmetic number, because the mean of its divisors is an integer number (104853856).

Almost surely, 2^418724989 is an apocalyptic number.

It is an amenable number.

418724989 is a deficient number, since it is larger than the sum of its proper divisors (690435).

418724989 is an equidigital number, since it uses as much as digits as its factorization.

418724989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690434.

The product of its digits is 1161216, while the sum is 52.

The square root of 418724989 is about 20462.7708045611. The cubic root of 418724989 is about 748.1286614878.

The spelling of 418724989 in words is "four hundred eighteen million, seven hundred twenty-four thousand, nine hundred eighty-nine".