1012998817 has 4 divisors (see below), whose sum is σ = 1013123376. Its totient is φ = 1012874260.

The previous prime is 1012998799. The next prime is 1012998827. The reversal of 1012998817 is 7188992101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012998817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012998827) 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, 49159 + ... + 66652.

It is an arithmetic number, because the mean of its divisors is an integer number (253280844).

Almost surely, 2^1012998817 is an apocalyptic number.

It is an amenable number.

1012998817 is a deficient number, since it is larger than the sum of its proper divisors (124559).

1012998817 is an equidigital number, since it uses as much as digits as its factorization.

1012998817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124558.

The product of its (nonzero) digits is 72576, while the sum is 46.

The square root of 1012998817 is about 31827.6423412103. The cubic root of 1012998817 is about 1004.3142990561.

The spelling of 1012998817 in words is "one billion, twelve million, nine hundred ninety-eight thousand, eight hundred seventeen".