618827401 has 4 divisors (see below), whose sum is σ = 622404612. Its totient is φ = 615250192.

The previous prime is 618827389. The next prime is 618827411. The reversal of 618827401 is 104728816.

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 600985225 + 17842176 = 24515^2 + 4224^2 .

It is a cyclic number.

It is not a de Polignac number, because 618827401 - 2⁷ = 618827273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618827411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1788346 + ... + 1788691.

It is an arithmetic number, because the mean of its divisors is an integer number (155601153).

Almost surely, 2^618827401 is an apocalyptic number.

It is an amenable number.

618827401 is a deficient number, since it is larger than the sum of its proper divisors (3577211).

618827401 is a wasteful number, since it uses less digits than its factorization.

618827401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577210.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 618827401 is about 24876.2416976520. The cubic root of 618827401 is about 852.1639905815.

The spelling of 618827401 in words is "six hundred eighteen million, eight hundred twenty-seven thousand, four hundred one".