61443023 has 4 divisors (see below), whose sum is σ = 63425088. Its totient is φ = 59460960.

The previous prime is 61443007. The next prime is 61443037. The reversal of 61443023 is 32034416.

It is a happy number.

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 61443023 - 2⁴ = 61443007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61443023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61443923) 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, 990986 + ... + 991047.

It is an arithmetic number, because the mean of its divisors is an integer number (15856272).

Almost surely, 2^61443023 is an apocalyptic number.

61443023 is a deficient number, since it is larger than the sum of its proper divisors (1982065).

61443023 is a wasteful number, since it uses less digits than its factorization.

61443023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982064.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 61443023 is about 7838.5600080627. The cubic root of 61443023 is about 394.6004034526.

Adding to 61443023 its reverse (32034416), we get a palindrome (93477439).

The spelling of 61443023 in words is "sixty-one million, four hundred forty-three thousand, twenty-three".