649998051 has 8 divisors (see below), whose sum is σ = 887802384. Its totient is φ = 422762880.

The previous prime is 649998031. The next prime is 649998071. The reversal of 649998051 is 150899946.

It is an interprime number because it is at equal distance from previous prime (649998031) and next prime (649998071).

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

It is not a de Polignac number, because 649998051 - 2¹⁰ = 649997027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649997985 and 649998003.

It is not an unprimeable number, because it can be changed into a prime (649998031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2642146 + ... + 2642391.

It is an arithmetic number, because the mean of its divisors is an integer number (110975298).

Almost surely, 2^649998051 is an apocalyptic number.

649998051 is a deficient number, since it is larger than the sum of its proper divisors (237804333).

649998051 is a wasteful number, since it uses less digits than its factorization.

649998051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284581.

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 649998051 is about 25495.0593449005. The cubic root of 649998051 is about 866.2382395452.

The spelling of 649998051 in words is "six hundred forty-nine million, nine hundred ninety-eight thousand, fifty-one".