1000398623 has 8 divisors (see below), whose sum is σ = 1149922848. Its totient is φ = 852526944.

The previous prime is 1000398617. The next prime is 1000398653. The reversal of 1000398623 is 3268930001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000398623 - 2⁶ = 1000398559 is a prime.

It is a super-2 number, since 2×1000398623² = 2001594809800592258, which contains 22 as substring.

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 1000398623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000398653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411836 + ... + 414257.

It is an arithmetic number, because the mean of its divisors is an integer number (143740356).

Almost surely, 2^1000398623 is an apocalyptic number.

1000398623 is a deficient number, since it is larger than the sum of its proper divisors (149524225).

1000398623 is an equidigital number, since it uses as much as digits as its factorization.

1000398623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826273.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1000398623 is about 31629.0787567390. The cubic root of 1000398623 is about 1000.1328566817.

The spelling of 1000398623 in words is "one billion, three hundred ninety-eight thousand, six hundred twenty-three".