920545139 has 2 divisors, whose sum is σ = 920545140. Its totient is φ = 920545138.

The previous prime is 920545091. The next prime is 920545147. The reversal of 920545139 is 931545029.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 920545139 - 2¹² = 920541043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (920545159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460272569 + 460272570.

It is an arithmetic number, because the mean of its divisors is an integer number (460272570).

Almost surely, 2^920545139 is an apocalyptic number.

920545139 is a deficient number, since it is larger than the sum of its proper divisors (1).

920545139 is an equidigital number, since it uses as much as digits as its factorization.

920545139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 920545139 is about 30340.4867956992. The cubic root of 920545139 is about 972.7808883252.

The spelling of 920545139 in words is "nine hundred twenty million, five hundred forty-five thousand, one hundred thirty-nine".