61908923 has 2 divisors, whose sum is σ = 61908924. Its totient is φ = 61908922.

The previous prime is 61908919. The next prime is 61908937. The reversal of 61908923 is 32980916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61908923 - 2² = 61908919 is a prime.

It is not a weakly prime, because it can be changed into another prime (61908983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30954461 + 30954462.

It is an arithmetic number, because the mean of its divisors is an integer number (30954462).

Almost surely, 2^61908923 is an apocalyptic number.

61908923 is a deficient number, since it is larger than the sum of its proper divisors (1).

61908923 is an equidigital number, since it uses as much as digits as its factorization.

61908923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 61908923 is about 7868.2223532384. Note that the first 3 decimals coincide. The cubic root of 61908923 is about 395.5952633616.

The spelling of 61908923 in words is "sixty-one million, nine hundred eight thousand, nine hundred twenty-three".