909477493 has 2 divisors, whose sum is σ = 909477494. Its totient is φ = 909477492.

The previous prime is 909477479. The next prime is 909477551. The reversal of 909477493 is 394774909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 762146449 + 147331044 = 27607^2 + 12138^2 .

It is an emirp because it is prime and its reverse (394774909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 909477493 - 2⁵ = 909477461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 909477493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (909477463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454738746 + 454738747.

It is an arithmetic number, because the mean of its divisors is an integer number (454738747).

Almost surely, 2^909477493 is an apocalyptic number.

It is an amenable number.

909477493 is a deficient number, since it is larger than the sum of its proper divisors (1).

909477493 is an equidigital number, since it uses as much as digits as its factorization.

909477493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1714608, while the sum is 52.

The square root of 909477493 is about 30157.5445452709. The cubic root of 909477493 is about 968.8666015848.

The spelling of 909477493 in words is "nine hundred nine million, four hundred seventy-seven thousand, four hundred ninety-three".