61089901 has 2 divisors, whose sum is σ = 61089902. Its totient is φ = 61089900.

The previous prime is 61089893. The next prime is 61089907. The reversal of 61089901 is 10998016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58446025 + 2643876 = 7645^2 + 1626^2 .

It is a cyclic number.

It is not a de Polignac number, because 61089901 - 2³ = 61089893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61089907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30544950 + 30544951.

It is an arithmetic number, because the mean of its divisors is an integer number (30544951).

Almost surely, 2^61089901 is an apocalyptic number.

It is an amenable number.

61089901 is a deficient number, since it is larger than the sum of its proper divisors (1).

61089901 is an equidigital number, since it uses as much as digits as its factorization.

61089901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 61089901 is about 7816.0028787098. The cubic root of 61089901 is about 393.8430086491.

The spelling of 61089901 in words is "sixty-one million, eighty-nine thousand, nine hundred one".