920709457 has 2 divisors, whose sum is σ = 920709458. Its totient is φ = 920709456.

The previous prime is 920709431. The next prime is 920709479. The reversal of 920709457 is 754907029.

920709457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 719097856 + 201611601 = 26816^2 + 14199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920709457 is a prime.

It is not a weakly prime, because it can be changed into another prime (920703457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460354728 + 460354729.

It is an arithmetic number, because the mean of its divisors is an integer number (460354729).

Almost surely, 2^920709457 is an apocalyptic number.

It is an amenable number.

920709457 is a deficient number, since it is larger than the sum of its proper divisors (1).

920709457 is an equidigital number, since it uses as much as digits as its factorization.

920709457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 920709457 is about 30343.1945747313. The cubic root of 920709457 is about 972.8387655884.

The spelling of 920709457 in words is "nine hundred twenty million, seven hundred nine thousand, four hundred fifty-seven".