61773623 has 2 divisors, whose sum is σ = 61773624. Its totient is φ = 61773622.

The previous prime is 61773601. The next prime is 61773641. The reversal of 61773623 is 32637716.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61773623 - 2⁶ = 61773559 is a prime.

It is a super-2 number, since 2×61773623² = 7631960997092258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61779623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30886811 + 30886812.

It is an arithmetic number, because the mean of its divisors is an integer number (30886812).

Almost surely, 2^61773623 is an apocalyptic number.

61773623 is a deficient number, since it is larger than the sum of its proper divisors (1).

61773623 is an equidigital number, since it uses as much as digits as its factorization.

61773623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 35.

The square root of 61773623 is about 7859.6197745184. The cubic root of 61773623 is about 395.3068661719.

The spelling of 61773623 in words is "sixty-one million, seven hundred seventy-three thousand, six hundred twenty-three".