61861103 has 2 divisors, whose sum is σ = 61861104. Its totient is φ = 61861102.

The previous prime is 61861081. The next prime is 61861127. The reversal of 61861103 is 30116816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61861103 - 2¹⁰ = 61860079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61861183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30930551 + 30930552.

It is an arithmetic number, because the mean of its divisors is an integer number (30930552).

Almost surely, 2^61861103 is an apocalyptic number.

61861103 is a deficient number, since it is larger than the sum of its proper divisors (1).

61861103 is an equidigital number, since it uses as much as digits as its factorization.

61861103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 61861103 is about 7865.1829603640. The cubic root of 61861103 is about 395.4933812343.

Adding to 61861103 its reverse (30116816), we get a palindrome (91977919).

The spelling of 61861103 in words is "sixty-one million, eight hundred sixty-one thousand, one hundred three".