61754809 has 2 divisors, whose sum is σ = 61754810. Its totient is φ = 61754808.

The previous prime is 61754801. The next prime is 61754827. The reversal of 61754809 is 90845716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44089600 + 17665209 = 6640^2 + 4203^2 .

It is a cyclic number.

It is not a de Polignac number, because 61754809 - 2³ = 61754801 is a prime.

It is not a weakly prime, because it can be changed into another prime (61754801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30877404 + 30877405.

It is an arithmetic number, because the mean of its divisors is an integer number (30877405).

Almost surely, 2^61754809 is an apocalyptic number.

It is an amenable number.

61754809 is a deficient number, since it is larger than the sum of its proper divisors (1).

61754809 is an equidigital number, since it uses as much as digits as its factorization.

61754809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 61754809 is about 7858.4228061361. The cubic root of 61754809 is about 395.2667300631.

The spelling of 61754809 in words is "sixty-one million, seven hundred fifty-four thousand, eight hundred nine".