61570477 has 2 divisors, whose sum is σ = 61570478. Its totient is φ = 61570476.

The previous prime is 61570441. The next prime is 61570511. The reversal of 61570477 is 77407516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46430596 + 15139881 = 6814^2 + 3891^2 .

It is a cyclic number.

It is not a de Polignac number, because 61570477 - 2⁷ = 61570349 is a prime.

It is equal to p_3649681 and since 61570477 and 3649681 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61570417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30785238 + 30785239.

It is an arithmetic number, because the mean of its divisors is an integer number (30785239).

Almost surely, 2^61570477 is an apocalyptic number.

It is an amenable number.

61570477 is a deficient number, since it is larger than the sum of its proper divisors (1).

61570477 is an equidigital number, since it uses as much as digits as its factorization.

61570477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41160, while the sum is 37.

The square root of 61570477 is about 7846.6857334801. The cubic root of 61570477 is about 394.8730607434.

The spelling of 61570477 in words is "sixty-one million, five hundred seventy thousand, four hundred seventy-seven".