798253661 has 4 divisors (see below), whose sum is σ = 800056032. Its totient is φ = 796451292.

The previous prime is 798253637. The next prime is 798253667. The reversal of 798253661 is 166352897.

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 not a de Polignac number, because 798253661 - 2¹⁸ = 797991517 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 (798253667) 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, 900521 + ... + 901406.

It is an arithmetic number, because the mean of its divisors is an integer number (200014008).

Almost surely, 2^798253661 is an apocalyptic number.

It is an amenable number.

798253661 is a deficient number, since it is larger than the sum of its proper divisors (1802371).

798253661 is a wasteful number, since it uses less digits than its factorization.

798253661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802370.

The product of its digits is 544320, while the sum is 47.

The square root of 798253661 is about 28253.3831779488. The cubic root of 798253661 is about 927.6417923167.

The spelling of 798253661 in words is "seven hundred ninety-eight million, two hundred fifty-three thousand, six hundred sixty-one".