920511649 has 8 divisors (see below), whose sum is σ = 960993000. Its totient is φ = 880612992.

The previous prime is 920511643. The next prime is 920511653. The reversal of 920511649 is 946115029.

It can be written as a sum of positive squares in 4 ways, for example, as 221861025 + 698650624 = 14895^2 + 26432^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 920511649 - 2¹³ = 920503457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920511643) 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, 142444 + ... + 148765.

It is an arithmetic number, because the mean of its divisors is an integer number (120124125).

Almost surely, 2^920511649 is an apocalyptic number.

It is an amenable number.

920511649 is a deficient number, since it is larger than the sum of its proper divisors (40481351).

920511649 is a wasteful number, since it uses less digits than its factorization.

920511649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291347.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 920511649 is about 30339.9348878668. The cubic root of 920511649 is about 972.7690913925.

The spelling of 920511649 in words is "nine hundred twenty million, five hundred eleven thousand, six hundred forty-nine".