90730061 has 2 divisors, whose sum is σ = 90730062. Its totient is φ = 90730060.

The previous prime is 90730049. The next prime is 90730063. The reversal of 90730061 is 16003709.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90364036 + 366025 = 9506^2 + 605^2 .

It is an emirp because it is prime and its reverse (16003709) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90730061 - 2¹⁸ = 90467917 is a prime.

Together with 90730063, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90730061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90730063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45365030 + 45365031.

It is an arithmetic number, because the mean of its divisors is an integer number (45365031).

Almost surely, 2^90730061 is an apocalyptic number.

It is an amenable number.

90730061 is a deficient number, since it is larger than the sum of its proper divisors (1).

90730061 is an equidigital number, since it uses as much as digits as its factorization.

90730061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 90730061 is about 9525.2328580460. The cubic root of 90730061 is about 449.3489531890.

The spelling of 90730061 in words is "ninety million, seven hundred thirty thousand, sixty-one".