972518587891 has 2 divisors, whose sum is σ = 972518587892. Its totient is φ = 972518587890.

The previous prime is 972518587877. The next prime is 972518587933. The reversal of 972518587891 is 198785815279.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 972518587891 - 2¹³ = 972518579699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 972518587891.

It is not a weakly prime, because it can be changed into another prime (972518587871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486259293945 + 486259293946.

It is an arithmetic number, because the mean of its divisors is an integer number (486259293946).

Almost surely, 2^972518587891 is an apocalyptic number.

972518587891 is a deficient number, since it is larger than the sum of its proper divisors (1).

972518587891 is an equidigital number, since it uses as much as digits as its factorization.

972518587891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 101606400, while the sum is 70.

The spelling of 972518587891 in words is "nine hundred seventy-two billion, five hundred eighteen million, five hundred eighty-seven thousand, eight hundred ninety-one".