990746000623 has 4 divisors (see below), whose sum is σ = 991949824048. Its totient is φ = 989542177200.

The previous prime is 990746000603. The next prime is 990746000659. The reversal of 990746000623 is 326000647099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326000647099 = 1753 ⋅185967283.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990746000623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990746000603) 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, 601910478 + ... + 601912123.

It is an arithmetic number, because the mean of its divisors is an integer number (247987456012).

Almost surely, 2^990746000623 is an apocalyptic number.

990746000623 is the 532044-th centered heptagonal number.

990746000623 is a deficient number, since it is larger than the sum of its proper divisors (1203823425).

990746000623 is a wasteful number, since it uses less digits than its factorization.

990746000623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203823424.

The product of its (nonzero) digits is 489888, while the sum is 46.

The spelling of 990746000623 in words is "nine hundred ninety billion, seven hundred forty-six million, six hundred twenty-three", and thus it is an aban number.