61003961 has 2 divisors, whose sum is σ = 61003962. Its totient is φ = 61003960.

The previous prime is 61003951. The next prime is 61003963. The reversal of 61003961 is 16930016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58813561 + 2190400 = 7669^2 + 1480^2 .

It is a cyclic number.

It is not a de Polignac number, because 61003961 - 2⁶ = 61003897 is a prime.

Together with 61003963, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61003961.

It is not a weakly prime, because it can be changed into another prime (61003963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30501980 + 30501981.

It is an arithmetic number, because the mean of its divisors is an integer number (30501981).

Almost surely, 2^61003961 is an apocalyptic number.

It is an amenable number.

61003961 is a deficient number, since it is larger than the sum of its proper divisors (1).

61003961 is an equidigital number, since it uses as much as digits as its factorization.

61003961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 61003961 is about 7810.5032488310. The cubic root of 61003961 is about 393.6582385987.

Adding to 61003961 its reverse (16930016), we get a palindrome (77933977).

The spelling of 61003961 in words is "sixty-one million, three thousand, nine hundred sixty-one".