61361089 has 4 divisors (see below), whose sum is σ = 64590640. Its totient is φ = 58131540.

The previous prime is 61361087. The next prime is 61361093. The reversal of 61361089 is 98016316.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61361089 - 2¹ = 61361087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61361081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1614747 + ... + 1614784.

It is an arithmetic number, because the mean of its divisors is an integer number (16147660).

Almost surely, 2^61361089 is an apocalyptic number.

It is an amenable number.

61361089 is a deficient number, since it is larger than the sum of its proper divisors (3229551).

61361089 is a wasteful number, since it uses less digits than its factorization.

61361089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229550.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 61361089 is about 7833.3319219857. The cubic root of 61361089 is about 394.4249261313.

It can be divided in two parts, 6136 and 1089, that added together give a square (7225 = 85²).

The spelling of 61361089 in words is "sixty-one million, three hundred sixty-one thousand, eighty-nine".