61401589 has 2 divisors, whose sum is σ = 61401590. Its totient is φ = 61401588.

The previous prime is 61401577. The next prime is 61401623. The reversal of 61401589 is 98510416.

It is an a-pointer prime, because the next prime (61401623) can be obtained adding 61401589 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54272689 + 7128900 = 7367^2 + 2670^2 .

It is a cyclic number.

It is not a de Polignac number, because 61401589 - 2⁹ = 61401077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61401289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30700794 + 30700795.

It is an arithmetic number, because the mean of its divisors is an integer number (30700795).

Almost surely, 2^61401589 is an apocalyptic number.

It is an amenable number.

61401589 is a deficient number, since it is larger than the sum of its proper divisors (1).

61401589 is an equidigital number, since it uses as much as digits as its factorization.

61401589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 61401589 is about 7835.9166024148. The cubic root of 61401589 is about 394.5116841326.

The spelling of 61401589 in words is "sixty-one million, four hundred one thousand, five hundred eighty-nine".