611506939 has 2 divisors, whose sum is σ = 611506940. Its totient is φ = 611506938.

The previous prime is 611506933. The next prime is 611506969. The reversal of 611506939 is 939605116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 611506939 - 2¹¹ = 611504891 is a prime.

It is not a weakly prime, because it can be changed into another prime (611506933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305753469 + 305753470.

It is an arithmetic number, because the mean of its divisors is an integer number (305753470).

Almost surely, 2^611506939 is an apocalyptic number.

611506939 is a deficient number, since it is larger than the sum of its proper divisors (1).

611506939 is an equidigital number, since it uses as much as digits as its factorization.

611506939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 611506939 is about 24728.6663409089. Note that the first 3 decimals coincide. The cubic root of 611506939 is about 848.7904082277.

The spelling of 611506939 in words is "six hundred eleven million, five hundred six thousand, nine hundred thirty-nine".