61760981 has 4 divisors (see below), whose sum is σ = 63890700. Its totient is φ = 59631264.

The previous prime is 61760977. The next prime is 61761013. The reversal of 61760981 is 18906716.

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 15928081 + 45832900 = 3991^2 + 6770^2 .

It is a cyclic number.

It is not a de Polignac number, because 61760981 - 2² = 61760977 is a prime.

It is a super-2 number, since 2×61760981² = 7628837548164722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61760921) 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, 1064816 + ... + 1064873.

It is an arithmetic number, because the mean of its divisors is an integer number (15972675).

Almost surely, 2^61760981 is an apocalyptic number.

It is an amenable number.

61760981 is a deficient number, since it is larger than the sum of its proper divisors (2129719).

61760981 is a wasteful number, since it uses less digits than its factorization.

61760981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129718.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 61760981 is about 7858.8154959892. The cubic root of 61760981 is about 395.2798977555.

The spelling of 61760981 in words is "sixty-one million, seven hundred sixty thousand, nine hundred eighty-one".