61000477 has 2 divisors, whose sum is σ = 61000478. Its totient is φ = 61000476.

The previous prime is 61000441. The next prime is 61000481. The reversal of 61000477 is 77400016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43811161 + 17189316 = 6619^2 + 4146^2 .

It is a cyclic number.

It is not a de Polignac number, because 61000477 - 2⁷ = 61000349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61000417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30500238 + 30500239.

It is an arithmetic number, because the mean of its divisors is an integer number (30500239).

Almost surely, 2^61000477 is an apocalyptic number.

It is an amenable number.

61000477 is a deficient number, since it is larger than the sum of its proper divisors (1).

61000477 is an equidigital number, since it uses as much as digits as its factorization.

61000477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 61000477 is about 7810.2802126428. The cubic root of 61000477 is about 393.6507443781.

The spelling of 61000477 in words is "sixty-one million, four hundred seventy-seven", and thus it is an aban number.