61800961 has 4 divisors (see below), whose sum is σ = 62180272. Its totient is φ = 61421652.

The previous prime is 61800941. The next prime is 61800971. The reversal of 61800961 is 16900816.

It is a happy number.

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 61800961 - 2⁷ = 61800833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61800941) 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, 189411 + ... + 189736.

It is an arithmetic number, because the mean of its divisors is an integer number (15545068).

Almost surely, 2^61800961 is an apocalyptic number.

It is an amenable number.

61800961 is a deficient number, since it is larger than the sum of its proper divisors (379311).

61800961 is a wasteful number, since it uses less digits than its factorization.

61800961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379310.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 61800961 is about 7861.3587248007. The cubic root of 61800961 is about 395.3651721001.

The spelling of 61800961 in words is "sixty-one million, eight hundred thousand, nine hundred sixty-one".