920685553 has 2 divisors, whose sum is σ = 920685554. Its totient is φ = 920685552.

The previous prime is 920685547. The next prime is 920685559. The reversal of 920685553 is 355586029.

It is a balanced prime because it is at equal distance from previous prime (920685547) and next prime (920685559).

It can be written as a sum of positive squares in only one way, i.e., 908238769 + 12446784 = 30137^2 + 3528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920685553 is a prime.

It is not a weakly prime, because it can be changed into another prime (920685559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460342776 + 460342777.

It is an arithmetic number, because the mean of its divisors is an integer number (460342777).

Almost surely, 2^920685553 is an apocalyptic number.

It is an amenable number.

920685553 is a deficient number, since it is larger than the sum of its proper divisors (1).

920685553 is an equidigital number, since it uses as much as digits as its factorization.

920685553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 43.

The square root of 920685553 is about 30342.8006782499. The cubic root of 920685553 is about 972.8303463783.

The spelling of 920685553 in words is "nine hundred twenty million, six hundred eighty-five thousand, five hundred fifty-three".