718420553 has 4 divisors (see below), whose sum is σ = 719006340. Its totient is φ = 717834768.

The previous prime is 718420543. The next prime is 718420559. The reversal of 718420553 is 355024817.

It is a happy number.

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 434430649 + 283989904 = 20843^2 + 16852^2 .

It is a cyclic number.

It is not a de Polignac number, because 718420553 - 2⁴ = 718420537 is a prime.

It is a super-2 number, since 2×718420553² = 1032256181945651618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (718420559) 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, 291050 + ... + 293507.

It is an arithmetic number, because the mean of its divisors is an integer number (179751585).

Almost surely, 2^718420553 is an apocalyptic number.

It is an amenable number.

718420553 is a deficient number, since it is larger than the sum of its proper divisors (585787).

718420553 is a wasteful number, since it uses less digits than its factorization.

718420553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585786.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 718420553 is about 26803.3683144488. The cubic root of 718420553 is about 895.6250860414.

The spelling of 718420553 in words is "seven hundred eighteen million, four hundred twenty thousand, five hundred fifty-three".