61569049 has 2 divisors, whose sum is σ = 61569050. Its totient is φ = 61569048.

The previous prime is 61569023. The next prime is 61569071. The reversal of 61569049 is 94096516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58905625 + 2663424 = 7675^2 + 1632^2 .

It is a cyclic number.

It is not a de Polignac number, because 61569049 - 2⁵ = 61569017 is a prime.

It is not a weakly prime, because it can be changed into another prime (61560049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30784524 + 30784525.

It is an arithmetic number, because the mean of its divisors is an integer number (30784525).

Almost surely, 2^61569049 is an apocalyptic number.

It is an amenable number.

61569049 is a deficient number, since it is larger than the sum of its proper divisors (1).

61569049 is an equidigital number, since it uses as much as digits as its factorization.

61569049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 61569049 is about 7846.5947391209. The cubic root of 61569049 is about 394.8700079649.

The spelling of 61569049 in words is "sixty-one million, five hundred sixty-nine thousand, forty-nine".