1023729747 has 16 divisors (see below), whose sum is σ = 1499285760. Its totient is φ = 618453792.

The previous prime is 1023729739. The next prime is 1023729787. The reversal of 1023729747 is 7479273201.

It is a happy number.

It is not a de Polignac number, because 1023729747 - 2³ = 1023729739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1023729699 and 1023729708.

It is not an unprimeable number, because it can be changed into a prime (1023729737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389128 + ... + 391749.

It is an arithmetic number, because the mean of its divisors is an integer number (93705360).

Almost surely, 2^1023729747 is an apocalyptic number.

1023729747 is a deficient number, since it is larger than the sum of its proper divisors (475556013).

1023729747 is a wasteful number, since it uses less digits than its factorization.

1023729747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780922.

The product of its (nonzero) digits is 148176, while the sum is 42.

The square root of 1023729747 is about 31995.7770182254. Note that the first 3 decimals coincide. The cubic root of 1023729747 is about 1007.8481609048.

The spelling of 1023729747 in words is "one billion, twenty-three million, seven hundred twenty-nine thousand, seven hundred forty-seven".