4905661 has 2 divisors, whose sum is σ = 4905662. Its totient is φ = 4905660.

The previous prime is 4905653. The next prime is 4905701. The reversal of 4905661 is 1665094.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4796100 + 109561 = 2190^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 4905661 - 2³ = 4905653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4906661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2452830 + 2452831.

It is an arithmetic number, because the mean of its divisors is an integer number (2452831).

Almost surely, 2^4905661 is an apocalyptic number.

It is an amenable number.

4905661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4905661 is an equidigital number, since it uses as much as digits as its factorization.

4905661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 4905661 is about 2214.8726825712. The cubic root of 4905661 is about 169.9153096038.

The spelling of 4905661 in words is "four million, nine hundred five thousand, six hundred sixty-one".