10649979 has 24 divisors (see below), whose sum is σ = 15921360. Its totient is φ = 6856512.

The previous prime is 10649959. The next prime is 10649981. The reversal of 10649979 is 97994601.

It is not a de Polignac number, because 10649979 - 2¹⁶ = 10584443 is a prime.

It is a super-2 number, since 2×10649979² = 226844105400882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10649909) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 39457 + ... + 39725.

It is an arithmetic number, because the mean of its divisors is an integer number (663390).

Almost surely, 2^10649979 is an apocalyptic number.

10649979 is a deficient number, since it is larger than the sum of its proper divisors (5271381).

10649979 is a wasteful number, since it uses less digits than its factorization.

10649979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 10649979 is about 3263.4305569446. The cubic root of 10649979 is about 220.0136286323.

It can be divided in two parts, 10649 and 979, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 10649979 in words is "ten million, six hundred forty-nine thousand, nine hundred seventy-nine".