61630773 has 4 divisors (see below), whose sum is σ = 82174368. Its totient is φ = 41087180.

The previous prime is 61630741. The next prime is 61630781. The reversal of 61630773 is 37703616.

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 61630773 - 2⁵ = 61630741 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61630873) 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, 10271793 + ... + 10271798.

It is an arithmetic number, because the mean of its divisors is an integer number (20543592).

Almost surely, 2^61630773 is an apocalyptic number.

It is an amenable number.

61630773 is a deficient number, since it is larger than the sum of its proper divisors (20543595).

61630773 is a wasteful number, since it uses less digits than its factorization.

61630773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20543594.

The product of its (nonzero) digits is 15876, while the sum is 33.

The square root of 61630773 is about 7850.5269249904. The cubic root of 61630773 is about 395.0019184866.

The spelling of 61630773 in words is "sixty-one million, six hundred thirty thousand, seven hundred seventy-three".