920749077 has 18 divisors (see below), whose sum is σ = 1339400322. Its totient is φ = 609490944.

The previous prime is 920749069. The next prime is 920749099. The reversal of 920749077 is 770947029.

It is a happy number.

920749077 is a `hidden beast` number, since 92 + 0 + 7 + 490 + 77 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 229795281 + 690953796 = 15159^2 + 26286^2 .

It is not a de Polignac number, because 920749077 - 2³ = 920749069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920749057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1196949 + ... + 1197717.

It is an arithmetic number, because the mean of its divisors is an integer number (74411129).

Almost surely, 2^920749077 is an apocalyptic number.

It is an amenable number.

920749077 is a deficient number, since it is larger than the sum of its proper divisors (418651245).

920749077 is an equidigital number, since it uses as much as digits as its factorization.

920749077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717 (or 945 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The square root of 920749077 is about 30343.8474323873. The cubic root of 920749077 is about 972.8527197983.

The spelling of 920749077 in words is "nine hundred twenty million, seven hundred forty-nine thousand, seventy-seven".