45394009 has 2 divisors, whose sum is σ = 45394010. Its totient is φ = 45394008.

The previous prime is 45394007. The next prime is 45394043. The reversal of 45394009 is 90049354.

It is an a-pointer prime, because the next prime (45394043) can be obtained adding 45394009 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24206400 + 21187609 = 4920^2 + 4603^2 .

It is a cyclic number.

It is not a de Polignac number, because 45394009 - 2¹ = 45394007 is a prime.

Together with 45394007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (45394003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22697004 + 22697005.

It is an arithmetic number, because the mean of its divisors is an integer number (22697005).

Almost surely, 2^45394009 is an apocalyptic number.

It is an amenable number.

45394009 is a deficient number, since it is larger than the sum of its proper divisors (1).

45394009 is an equidigital number, since it uses as much as digits as its factorization.

45394009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 45394009 is about 6737.5076252276. The cubic root of 45394009 is about 356.7244249005.

The spelling of 45394009 in words is "forty-five million, three hundred ninety-four thousand, nine".