1621134598 has 4 divisors (see below), whose sum is σ = 2431701900. Its totient is φ = 810567298.

The previous prime is 1621134583. The next prime is 1621134617. The reversal of 1621134598 is 8954311261.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1621134598.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405283648 + ... + 405283651.

It is an arithmetic number, because the mean of its divisors is an integer number (607925475).

Almost surely, 2^1621134598 is an apocalyptic number.

1621134598 is a deficient number, since it is larger than the sum of its proper divisors (810567302).

1621134598 is an equidigital number, since it uses as much as digits as its factorization.

1621134598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810567301.

The product of its digits is 51840, while the sum is 40.

The square root of 1621134598 is about 40263.3157849673. The cubic root of 1621134598 is about 1174.7344136119.

The spelling of 1621134598 in words is "one billion, six hundred twenty-one million, one hundred thirty-four thousand, five hundred ninety-eight".