641092139 has 2 divisors, whose sum is σ = 641092140. Its totient is φ = 641092138.

The previous prime is 641092103. The next prime is 641092159. The reversal of 641092139 is 931290146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641092139 - 2¹² = 641088043 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 641092099 and 641092108.

It is not a weakly prime, because it can be changed into another prime (641092159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320546069 + 320546070.

It is an arithmetic number, because the mean of its divisors is an integer number (320546070).

Almost surely, 2^641092139 is an apocalyptic number.

641092139 is a deficient number, since it is larger than the sum of its proper divisors (1).

641092139 is an equidigital number, since it uses as much as digits as its factorization.

641092139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 641092139 is about 25319.7973728069. The cubic root of 641092139 is about 862.2637937230.

The spelling of 641092139 in words is "six hundred forty-one million, ninety-two thousand, one hundred thirty-nine".