61073689 has 4 divisors (see below), whose sum is σ = 63043840. Its totient is φ = 59103540.

The previous prime is 61073687. The next prime is 61073693. The reversal of 61073689 is 98637016.

61073689 = 478² + 479² + ... + 663².

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 61073689 - 2¹ = 61073687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61073687) 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, 985029 + ... + 985090.

It is an arithmetic number, because the mean of its divisors is an integer number (15760960).

Almost surely, 2^61073689 is an apocalyptic number.

It is an amenable number.

61073689 is a deficient number, since it is larger than the sum of its proper divisors (1970151).

61073689 is a wasteful number, since it uses less digits than its factorization.

61073689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970150.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 61073689 is about 7814.9657068985. The cubic root of 61073689 is about 393.8081662957.

The spelling of 61073689 in words is "sixty-one million, seventy-three thousand, six hundred eighty-nine".