61419961 has 4 divisors (see below), whose sum is σ = 61507300. Its totient is φ = 61332624.

The previous prime is 61419949. The next prime is 61419973. The reversal of 61419961 is 16991416.

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

It is an interprime number because it is at equal distance from previous prime (61419949) and next prime (61419973).

It can be written as a sum of positive squares in 2 ways, for example, as 18974736 + 42445225 = 4356^2 + 6515^2 .

It is a cyclic number.

It is not a de Polignac number, because 61419961 - 2²⁵ = 27865529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61419961.

It is not an unprimeable number, because it can be changed into a prime (61419901) 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, 42606 + ... + 44023.

It is an arithmetic number, because the mean of its divisors is an integer number (15376825).

Almost surely, 2^61419961 is an apocalyptic number.

It is an amenable number.

61419961 is a deficient number, since it is larger than the sum of its proper divisors (87339).

61419961 is an equidigital number, since it uses as much as digits as its factorization.

61419961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87338.

The product of its digits is 11664, while the sum is 37.

The square root of 61419961 is about 7837.0888089902. The cubic root of 61419961 is about 394.5510275546.

The spelling of 61419961 in words is "sixty-one million, four hundred nineteen thousand, nine hundred sixty-one".