61145069 has 2 divisors, whose sum is σ = 61145070. Its totient is φ = 61145068.

The previous prime is 61145033. The next prime is 61145083. The reversal of 61145069 is 96054116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35844169 + 25300900 = 5987^2 + 5030^2 .

It is a cyclic number.

It is not a de Polignac number, because 61145069 - 2⁸ = 61144813 is a prime.

It is a super-2 number, since 2×61145069² = 7477438926029522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61145099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30572534 + 30572535.

It is an arithmetic number, because the mean of its divisors is an integer number (30572535).

Almost surely, 2^61145069 is an apocalyptic number.

It is an amenable number.

61145069 is a deficient number, since it is larger than the sum of its proper divisors (1).

61145069 is an equidigital number, since it uses as much as digits as its factorization.

61145069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 61145069 is about 7819.5312519358. The cubic root of 61145069 is about 393.9615279329.

The spelling of 61145069 in words is "sixty-one million, one hundred forty-five thousand, sixty-nine".