61384121 has 2 divisors, whose sum is σ = 61384122. Its totient is φ = 61384120.

The previous prime is 61384109. The next prime is 61384129. The reversal of 61384121 is 12148316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54228496 + 7155625 = 7364^2 + 2675^2 .

It is a cyclic number.

It is not a de Polignac number, because 61384121 - 2¹⁴ = 61367737 is a prime.

It is equal to p_3639320 and since 61384121 and 3639320 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (61384129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30692060 + 30692061.

It is an arithmetic number, because the mean of its divisors is an integer number (30692061).

Almost surely, 2^61384121 is an apocalyptic number.

It is an amenable number.

61384121 is a deficient number, since it is larger than the sum of its proper divisors (1).

61384121 is an equidigital number, since it uses as much as digits as its factorization.

61384121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 61384121 is about 7834.8019119822. The cubic root of 61384121 is about 394.4742693370.

The spelling of 61384121 in words is "sixty-one million, three hundred eighty-four thousand, one hundred twenty-one".