1023147879 has 16 divisors (see below), whose sum is σ = 1471566432. Its totient is φ = 628587648.

The previous prime is 1023147871. The next prime is 1023147899. The reversal of 1023147879 is 9787413201.

It is not a de Polignac number, because 1023147879 - 2³ = 1023147871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1023147879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023147871) 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, 2509 + ... + 45305.

It is an arithmetic number, because the mean of its divisors is an integer number (91972902).

Almost surely, 2^1023147879 is an apocalyptic number.

1023147879 is a deficient number, since it is larger than the sum of its proper divisors (448418553).

1023147879 is a wasteful number, since it uses less digits than its factorization.

1023147879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43426.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 1023147879 is about 31986.6828383313. The cubic root of 1023147879 is about 1007.6571776444.

The spelling of 1023147879 in words is "one billion, twenty-three million, one hundred forty-seven thousand, eight hundred seventy-nine".