61988123 has 2 divisors, whose sum is σ = 61988124. Its totient is φ = 61988122.

The previous prime is 61988119. The next prime is 61988131. The reversal of 61988123 is 32188916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61988123 - 2² = 61988119 is a prime.

It is not a weakly prime, because it can be changed into another prime (61981123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30994061 + 30994062.

It is an arithmetic number, because the mean of its divisors is an integer number (30994062).

Almost surely, 2^61988123 is an apocalyptic number.

61988123 is a deficient number, since it is larger than the sum of its proper divisors (1).

61988123 is an equidigital number, since it uses as much as digits as its factorization.

61988123 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 61988123 is about 7873.2536476351. The cubic root of 61988123 is about 395.7638863010.

The spelling of 61988123 in words is "sixty-one million, nine hundred eighty-eight thousand, one hundred twenty-three".