1098570623 has 4 divisors (see below), whose sum is σ = 1098688080. Its totient is φ = 1098453168.

The previous prime is 1098570601. The next prime is 1098570679. The reversal of 1098570623 is 3260758901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3260758901 = 31 ⋅105185771.

It is a cyclic number.

It is not a de Polignac number, because 1098570623 - 2⁶ = 1098570559 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 (1098570223) 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, 43358 + ... + 63851.

It is an arithmetic number, because the mean of its divisors is an integer number (274672020).

Almost surely, 2^1098570623 is an apocalyptic number.

1098570623 is a deficient number, since it is larger than the sum of its proper divisors (117457).

1098570623 is a wasteful number, since it uses less digits than its factorization.

1098570623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117456.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 1098570623 is about 33144.6922296768. The cubic root of 1098570623 is about 1031.8327951446.

The spelling of 1098570623 in words is "one billion, ninety-eight million, five hundred seventy thousand, six hundred twenty-three".