61443723 has 16 divisors (see below), whose sum is σ = 90245376. Its totient is φ = 36875040.

The previous prime is 61443703. The next prime is 61443727. The reversal of 61443723 is 32734416.

It is not a de Polignac number, because 61443723 - 2⁵ = 61443691 is a prime.

It is a super-2 number, since 2×61443723² = 7550662192201458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61443727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5640 + ... + 12437.

It is an arithmetic number, because the mean of its divisors is an integer number (5640336).

Almost surely, 2^61443723 is an apocalyptic number.

61443723 is a deficient number, since it is larger than the sum of its proper divisors (28801653).

61443723 is a wasteful number, since it uses less digits than its factorization.

61443723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18194.

The product of its digits is 12096, while the sum is 30.

The square root of 61443723 is about 7838.6046589938. The cubic root of 61443723 is about 394.6019019641.

The spelling of 61443723 in words is "sixty-one million, four hundred forty-three thousand, seven hundred twenty-three".