61432961 has 4 divisors (see below), whose sum is σ = 61491924. Its totient is φ = 61374000.

The previous prime is 61432957. The next prime is 61432981. The reversal of 61432961 is 16923416.

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 25959025 + 35473936 = 5095^2 + 5956^2 .

It is a cyclic number.

It is not a de Polignac number, because 61432961 - 2² = 61432957 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61432981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27890 + ... + 30011.

It is an arithmetic number, because the mean of its divisors is an integer number (15372981).

Almost surely, 2^61432961 is an apocalyptic number.

It is an amenable number.

61432961 is a deficient number, since it is larger than the sum of its proper divisors (58963).

61432961 is a wasteful number, since it uses less digits than its factorization.

61432961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58962.

The product of its digits is 7776, while the sum is 32.

The square root of 61432961 is about 7837.9181547143. The cubic root of 61432961 is about 394.5788621622.

The spelling of 61432961 in words is "sixty-one million, four hundred thirty-two thousand, nine hundred sixty-one".