61753961 has 4 divisors (see below), whose sum is σ = 61951572. Its totient is φ = 61556352.

The previous prime is 61753949. The next prime is 61753969. The reversal of 61753961 is 16935716.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1210000 + 60543961 = 1100^2 + 7781^2 .

It is a cyclic number.

It is not a de Polignac number, because 61753961 - 2⁶ = 61753897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61753969) 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, 98336 + ... + 98961.

It is an arithmetic number, because the mean of its divisors is an integer number (15487893).

Almost surely, 2^61753961 is an apocalyptic number.

It is an amenable number.

61753961 is a deficient number, since it is larger than the sum of its proper divisors (197611).

61753961 is a wasteful number, since it uses less digits than its factorization.

61753961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197610.

The product of its digits is 34020, while the sum is 38.

The square root of 61753961 is about 7858.3688511039. The cubic root of 61753961 is about 395.2649208236.

The spelling of 61753961 in words is "sixty-one million, seven hundred fifty-three thousand, nine hundred sixty-one".