618634001 has 4 divisors (see below), whose sum is σ = 628775604. Its totient is φ = 608492400.

The previous prime is 618633979. The next prime is 618634021. The reversal of 618634001 is 100436816.

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 128232976 + 490401025 = 11324^2 + 22145^2 .

It is a cyclic number.

It is not a de Polignac number, because 618634001 - 2⁶ = 618633937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618634021) 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, 5070710 + ... + 5070831.

It is an arithmetic number, because the mean of its divisors is an integer number (157193901).

Almost surely, 2^618634001 is an apocalyptic number.

618634001 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

618634001 is a deficient number, since it is larger than the sum of its proper divisors (10141603).

618634001 is a wasteful number, since it uses less digits than its factorization.

618634001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10141602.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 618634001 is about 24872.3541507434. The cubic root of 618634001 is about 852.0752067044.

The spelling of 618634001 in words is "six hundred eighteen million, six hundred thirty-four thousand, one".