990973073 has 2 divisors, whose sum is σ = 990973074. Its totient is φ = 990973072.

The previous prime is 990973043. The next prime is 990973103. The reversal of 990973073 is 370379099.

It is a balanced prime because it is at equal distance from previous prime (990973043) and next prime (990973103).

It can be written as a sum of positive squares in only one way, i.e., 776848384 + 214124689 = 27872^2 + 14633^2 .

It is a cyclic number.

It is not a de Polignac number, because 990973073 - 2¹⁰ = 990972049 is a prime.

It is a super-2 number, since 2×990973073² = 1964055262822126658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (990973043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495486536 + 495486537.

It is an arithmetic number, because the mean of its divisors is an integer number (495486537).

Almost surely, 2^990973073 is an apocalyptic number.

It is an amenable number.

990973073 is a deficient number, since it is larger than the sum of its proper divisors (1).

990973073 is an equidigital number, since it uses as much as digits as its factorization.

990973073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 321489, while the sum is 47.

The square root of 990973073 is about 31479.7247923167. The cubic root of 990973073 is about 996.9819247186.

The spelling of 990973073 in words is "nine hundred ninety million, nine hundred seventy-three thousand, seventy-three".