90533136971 has 2 divisors, whose sum is σ = 90533136972. Its totient is φ = 90533136970.

The previous prime is 90533136959. The next prime is 90533136977. The reversal of 90533136971 is 17963133509.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (17963133509) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90533136971 is a prime.

It is not a weakly prime, because it can be changed into another prime (90533136977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45266568485 + 45266568486.

It is an arithmetic number, because the mean of its divisors is an integer number (45266568486).

Almost surely, 2^90533136971 is an apocalyptic number.

90533136971 is a deficient number, since it is larger than the sum of its proper divisors (1).

90533136971 is an equidigital number, since it uses as much as digits as its factorization.

90533136971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 459270, while the sum is 47.

The spelling of 90533136971 in words is "ninety billion, five hundred thirty-three million, one hundred thirty-six thousand, nine hundred seventy-one".