61603963 has 4 divisors (see below), whose sum is σ = 62383840. Its totient is φ = 60824088.

The previous prime is 61603957. The next prime is 61603987. The reversal of 61603963 is 36930616.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61603963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61603933) 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, 389820 + ... + 389977.

It is an arithmetic number, because the mean of its divisors is an integer number (15595960).

Almost surely, 2^61603963 is an apocalyptic number.

61603963 is a deficient number, since it is larger than the sum of its proper divisors (779877).

61603963 is an equidigital number, since it uses as much as digits as its factorization.

61603963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779876.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 61603963 is about 7848.8192105565. The cubic root of 61603963 is about 394.9446335900.

The spelling of 61603963 in words is "sixty-one million, six hundred three thousand, nine hundred sixty-three".