61343869 has 2 divisors, whose sum is σ = 61343870. Its totient is φ = 61343868.

The previous prime is 61343851. The next prime is 61343881. The reversal of 61343869 is 96834316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61308900 + 34969 = 7830^2 + 187^2 .

It is a cyclic number.

It is not a de Polignac number, because 61343869 - 2⁷ = 61343741 is a prime.

It is a super-2 number, since 2×61343869² = 7526140527778322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61343839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30671934 + 30671935.

It is an arithmetic number, because the mean of its divisors is an integer number (30671935).

Almost surely, 2^61343869 is an apocalyptic number.

It is an amenable number.

61343869 is a deficient number, since it is larger than the sum of its proper divisors (1).

61343869 is an equidigital number, since it uses as much as digits as its factorization.

61343869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The square root of 61343869 is about 7832.2326957260. The cubic root of 61343869 is about 394.3880263478.

The spelling of 61343869 in words is "sixty-one million, three hundred forty-three thousand, eight hundred sixty-nine".