980535191 has 4 divisors (see below), whose sum is σ = 992348952. Its totient is φ = 968721432.

The previous prime is 980535133. The next prime is 980535221. The reversal of 980535191 is 191535089.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-980535191 is a prime.

It is a super-2 number, since 2×980535191² = 1922898521578812962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (980535091) 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, 5906756 + ... + 5906921.

It is an arithmetic number, because the mean of its divisors is an integer number (248087238).

Almost surely, 2^980535191 is an apocalyptic number.

980535191 is a deficient number, since it is larger than the sum of its proper divisors (11813761).

980535191 is a wasteful number, since it uses less digits than its factorization.

980535191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11813760.

The product of its (nonzero) digits is 48600, while the sum is 41.

The square root of 980535191 is about 31313.4985429607. The cubic root of 980535191 is about 993.4691714623.

The spelling of 980535191 in words is "nine hundred eighty million, five hundred thirty-five thousand, one hundred ninety-one".