61188923 has 2 divisors, whose sum is σ = 61188924. Its totient is φ = 61188922.

The previous prime is 61188893. The next prime is 61188929. The reversal of 61188923 is 32988116.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61188923 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61188929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30594461 + 30594462.

It is an arithmetic number, because the mean of its divisors is an integer number (30594462).

Almost surely, 2^61188923 is an apocalyptic number.

61188923 is a deficient number, since it is larger than the sum of its proper divisors (1).

61188923 is an equidigital number, since it uses as much as digits as its factorization.

61188923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 61188923 is about 7822.3348816066. The cubic root of 61188923 is about 394.0556901191.

The spelling of 61188923 in words is "sixty-one million, one hundred eighty-eight thousand, nine hundred twenty-three".