61143517 has 2 divisors, whose sum is σ = 61143518. Its totient is φ = 61143516.

The previous prime is 61143479. The next prime is 61143541. The reversal of 61143517 is 71534116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36650916 + 24492601 = 6054^2 + 4949^2 .

It is a cyclic number.

It is not a de Polignac number, because 61143517 - 2⁷ = 61143389 is a prime.

It is a super-2 number, since 2×61143517² = 7477059342258578, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61113517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30571758 + 30571759.

It is an arithmetic number, because the mean of its divisors is an integer number (30571759).

Almost surely, 2^61143517 is an apocalyptic number.

It is an amenable number.

61143517 is a deficient number, since it is larger than the sum of its proper divisors (1).

61143517 is an equidigital number, since it uses as much as digits as its factorization.

61143517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 28.

The square root of 61143517 is about 7819.4320126209. The cubic root of 61143517 is about 393.9581946935.

The spelling of 61143517 in words is "sixty-one million, one hundred forty-three thousand, five hundred seventeen".