918661501 has 8 divisors (see below), whose sum is σ = 926091008. Its totient is φ = 911250000.

The previous prime is 918661481. The next prime is 918661519. The reversal of 918661501 is 105166819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 3-Lehmer number, since φ(918661501) divides (918661501-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 918661501 - 2¹⁷ = 918530429 is a prime.

It is a deceptive number, since it divides R_918661500.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918661531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109351 + ... + 117451.

It is an arithmetic number, because the mean of its divisors is an integer number (115761376).

It is a Poulet number, since it divides 2^918661500-1.

Almost surely, 2^918661501 is an apocalyptic number.

It is an amenable number.

918661501 is a deficient number, since it is larger than the sum of its proper divisors (7429507).

918661501 is a wasteful number, since it uses less digits than its factorization.

918661501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9003.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 918661501 is about 30309.4292423991. The cubic root of 918661501 is about 972.1169273015.

The spelling of 918661501 in words is "nine hundred eighteen million, six hundred sixty-one thousand, five hundred one".