61572089 has 2 divisors, whose sum is σ = 61572090. Its totient is φ = 61572088.

The previous prime is 61572083. The next prime is 61572101. The reversal of 61572089 is 98027516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44622400 + 16949689 = 6680^2 + 4117^2 .

It is a cyclic number.

It is not a de Polignac number, because 61572089 - 2⁴ = 61572073 is a prime.

It is a super-2 number, since 2×61572089² = 7582244287647842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61572083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30786044 + 30786045.

It is an arithmetic number, because the mean of its divisors is an integer number (30786045).

Almost surely, 2^61572089 is an apocalyptic number.

It is an amenable number.

61572089 is a deficient number, since it is larger than the sum of its proper divisors (1).

61572089 is an equidigital number, since it uses as much as digits as its factorization.

61572089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 61572089 is about 7846.7884513347. The cubic root of 61572089 is about 394.8765068204.

The spelling of 61572089 in words is "sixty-one million, five hundred seventy-two thousand, eighty-nine".