31066601 has 2 divisors, whose sum is σ = 31066602. Its totient is φ = 31066600.

The previous prime is 31066591. The next prime is 31066657. The reversal of 31066601 is 10666013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19669225 + 11397376 = 4435^2 + 3376^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31066601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31066661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15533300 + 15533301.

It is an arithmetic number, because the mean of its divisors is an integer number (15533301).

Almost surely, 2^31066601 is an apocalyptic number.

It is an amenable number.

31066601 is a deficient number, since it is larger than the sum of its proper divisors (1).

31066601 is an equidigital number, since it uses as much as digits as its factorization.

31066601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 31066601 is about 5573.7421002411. The cubic root of 31066601 is about 314.3628710900.

The spelling of 31066601 in words is "thirty-one million, sixty-six thousand, six hundred one".