61990423 has 4 divisors (see below), whose sum is σ = 67625928. Its totient is φ = 56354920.

The previous prime is 61990417. The next prime is 61990433. The reversal of 61990423 is 32409916.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61990423 - 2¹³ = 61982231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61990403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2817736 + ... + 2817757.

It is an arithmetic number, because the mean of its divisors is an integer number (16906482).

Almost surely, 2^61990423 is an apocalyptic number.

61990423 is a deficient number, since it is larger than the sum of its proper divisors (5635505).

61990423 is a wasteful number, since it uses less digits than its factorization.

61990423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5635504.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 61990423 is about 7873.3997104173. The cubic root of 61990423 is about 395.7687810327.

The spelling of 61990423 in words is "sixty-one million, nine hundred ninety thousand, four hundred twenty-three".