906309493 has 2 divisors, whose sum is σ = 906309494. Its totient is φ = 906309492.

The previous prime is 906309451. The next prime is 906309539. The reversal of 906309493 is 394903609.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 902281444 + 4028049 = 30038^2 + 2007^2 .

It is a cyclic number.

It is not a de Polignac number, because 906309493 - 2²¹ = 904212341 is a prime.

It is a super-3 number, since 3×906309493³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (906309403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453154746 + 453154747.

It is an arithmetic number, because the mean of its divisors is an integer number (453154747).

Almost surely, 2^906309493 is an apocalyptic number.

It is an amenable number.

906309493 is a deficient number, since it is larger than the sum of its proper divisors (1).

906309493 is an equidigital number, since it uses as much as digits as its factorization.

906309493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 43.

The square root of 906309493 is about 30104.9745557109. The cubic root of 906309493 is about 967.7403357914.

The spelling of 906309493 in words is "nine hundred six million, three hundred nine thousand, four hundred ninety-three".