61775969 has 2 divisors, whose sum is σ = 61775970. Its totient is φ = 61775968.

The previous prime is 61775957. The next prime is 61776017. The reversal of 61775969 is 96957716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54937744 + 6838225 = 7412^2 + 2615^2 .

It is a cyclic number.

It is not a de Polignac number, because 61775969 - 2¹² = 61771873 is a prime.

It is a super-2 number, since 2×61775969² = 7632540691777922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61775929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30887984 + 30887985.

It is an arithmetic number, because the mean of its divisors is an integer number (30887985).

Almost surely, 2^61775969 is an apocalyptic number.

It is an amenable number.

61775969 is a deficient number, since it is larger than the sum of its proper divisors (1).

61775969 is an equidigital number, since it uses as much as digits as its factorization.

61775969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 714420, while the sum is 50.

The square root of 61775969 is about 7859.7690169623. The cubic root of 61775969 is about 395.3118703474.

The spelling of 61775969 in words is "sixty-one million, seven hundred seventy-five thousand, nine hundred sixty-nine".