420829553 has 4 divisors (see below), whose sum is σ = 425168100. Its totient is φ = 416491008.

The previous prime is 420829547. The next prime is 420829571. The reversal of 420829553 is 355928024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141538609 + 279290944 = 11897^2 + 16712^2 .

It is a cyclic number.

It is not a de Polignac number, because 420829553 - 2¹⁸ = 420567409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420829523) 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, 2169128 + ... + 2169321.

It is an arithmetic number, because the mean of its divisors is an integer number (106292025).

Almost surely, 2^420829553 is an apocalyptic number.

It is an amenable number.

420829553 is a deficient number, since it is larger than the sum of its proper divisors (4338547).

420829553 is an equidigital number, since it uses as much as digits as its factorization.

420829553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4338546.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 420829553 is about 20514.1305689517. The cubic root of 420829553 is about 749.3799633993.

The spelling of 420829553 in words is "four hundred twenty million, eight hundred twenty-nine thousand, five hundred fifty-three".