10018649 has 4 divisors (see below), whose sum is σ = 10097664. Its totient is φ = 9939636.

The previous prime is 10018633. The next prime is 10018651. The reversal of 10018649 is 94681001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10018649 - 2⁴ = 10018633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10018609) 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, 39317 + ... + 39570.

It is an arithmetic number, because the mean of its divisors is an integer number (2524416).

Almost surely, 2^10018649 is an apocalyptic number.

It is an amenable number.

10018649 is a deficient number, since it is larger than the sum of its proper divisors (79015).

10018649 is an equidigital number, since it uses as much as digits as its factorization.

10018649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79014.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 10018649 is about 3165.2249525113. The cubic root of 10018649 is about 215.5773126777.

The spelling of 10018649 in words is "ten million, eighteen thousand, six hundred forty-nine".