61423381 has 4 divisors (see below), whose sum is σ = 61530412. Its totient is φ = 61316352.

The previous prime is 61423357. The next prime is 61423459. The reversal of 61423381 is 18332416.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57138481 + 4284900 = 7559^2 + 2070^2 .

It is a cyclic number.

It is not a de Polignac number, because 61423381 - 2⁹ = 61422869 is a prime.

It is a super-2 number, since 2×61423381² = 7545663466942322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61423301) 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, 52650 + ... + 53803.

It is an arithmetic number, because the mean of its divisors is an integer number (15382603).

Almost surely, 2^61423381 is an apocalyptic number.

It is an amenable number.

61423381 is a deficient number, since it is larger than the sum of its proper divisors (107031).

61423381 is a wasteful number, since it uses less digits than its factorization.

61423381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107030.

The product of its digits is 3456, while the sum is 28.

The square root of 61423381 is about 7837.3069992185. The cubic root of 61423381 is about 394.5583505782.

Adding to 61423381 its reverse (18332416), we get a palindrome (79755797).

The spelling of 61423381 in words is "sixty-one million, four hundred twenty-three thousand, three hundred eighty-one".