901618 has 4 divisors (see below), whose sum is σ = 1352430. Its totient is φ = 450808.

The previous prime is 901613. The next prime is 901643. The reversal of 901618 is 816109.

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

It can be written as a sum of positive squares in only one way, i.e., 710649 + 190969 = 843^2 + 437^2 .

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 901592 and 901601.

It is not an unprimeable number, because it can be changed into a prime (901613) by changing a digit.

901618 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225403 + ... + 225406.

2⁹⁰¹⁶¹⁸ is an apocalyptic number.

901618 is a deficient number, since it is larger than the sum of its proper divisors (450812).

901618 is a wasteful number, since it uses less digits than its factorization.

901618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450811.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 901618 is about 949.5356760017. The cubic root of 901618 is about 96.6067616686.

The spelling of 901618 in words is "nine hundred one thousand, six hundred eighteen".