61154609 has 2 divisors, whose sum is σ = 61154610. Its totient is φ = 61154608.

The previous prime is 61154581. The next prime is 61154623. The reversal of 61154609 is 90645116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61152400 + 2209 = 7820^2 + 47^2 .

It is a cyclic number.

It is not a de Polignac number, because 61154609 - 2¹⁶ = 61089073 is a prime.

It is not a weakly prime, because it can be changed into another prime (61154629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30577304 + 30577305.

It is an arithmetic number, because the mean of its divisors is an integer number (30577305).

Almost surely, 2^61154609 is an apocalyptic number.

It is an amenable number.

61154609 is a deficient number, since it is larger than the sum of its proper divisors (1).

61154609 is an equidigital number, since it uses as much as digits as its factorization.

61154609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 61154609 is about 7820.1412391337. The cubic root of 61154609 is about 393.9820158076.

The spelling of 61154609 in words is "sixty-one million, one hundred fifty-four thousand, six hundred nine".