61603939 has 2 divisors, whose sum is σ = 61603940. Its totient is φ = 61603938.

The previous prime is 61603933. The next prime is 61603957. The reversal of 61603939 is 93930616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61603939 - 2⁷ = 61603811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61603898 and 61603907.

It is not a weakly prime, because it can be changed into another prime (61603933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30801969 + 30801970.

It is an arithmetic number, because the mean of its divisors is an integer number (30801970).

Almost surely, 2^61603939 is an apocalyptic number.

61603939 is a deficient number, since it is larger than the sum of its proper divisors (1).

61603939 is an equidigital number, since it uses as much as digits as its factorization.

61603939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 61603939 is about 7848.8176816639. The cubic root of 61603939 is about 394.9445823017.

The spelling of 61603939 in words is "sixty-one million, six hundred three thousand, nine hundred thirty-nine".