901966649 has 4 divisors (see below), whose sum is σ = 926344164. Its totient is φ = 877589136.

The previous prime is 901966633. The next prime is 901966657. The reversal of 901966649 is 946669109.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 344770624 + 557196025 = 18568^2 + 23605^2 .

It is a cyclic number.

It is not a de Polignac number, because 901966649 - 2⁴ = 901966633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 901966597 and 901966606.

It is not an unprimeable number, because it can be changed into a prime (901966609) 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 3 ways as a sum of consecutive naturals, for example, 12188702 + ... + 12188775.

It is an arithmetic number, because the mean of its divisors is an integer number (231586041).

Almost surely, 2^901966649 is an apocalyptic number.

It is an amenable number.

901966649 is a deficient number, since it is larger than the sum of its proper divisors (24377515).

901966649 is a wasteful number, since it uses less digits than its factorization.

901966649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24377514.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 901966649 is about 30032.7595968136. The cubic root of 901966649 is about 966.1921243688.

The spelling of 901966649 in words is "nine hundred one million, nine hundred sixty-six thousand, six hundred forty-nine".