90312320039 has 2 divisors, whose sum is σ = 90312320040. Its totient is φ = 90312320038.

The previous prime is 90312319949. The next prime is 90312320101. The reversal of 90312320039 is 93002321309.

It is a strong prime.

It is an emirp because it is prime and its reverse (93002321309) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90312320039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90312319987 and 90312320014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90312323039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45156160019 + 45156160020.

It is an arithmetic number, because the mean of its divisors is an integer number (45156160020).

Almost surely, 2^90312320039 is an apocalyptic number.

90312320039 is a deficient number, since it is larger than the sum of its proper divisors (1).

90312320039 is an equidigital number, since it uses as much as digits as its factorization.

90312320039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 32.

The spelling of 90312320039 in words is "ninety billion, three hundred twelve million, three hundred twenty thousand, thirty-nine".