45909091 has 2 divisors, whose sum is σ = 45909092. Its totient is φ = 45909090.

The previous prime is 45909089. The next prime is 45909107. The reversal of 45909091 is 19090954.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45909091 - 2¹ = 45909089 is a prime.

Together with 45909089, 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 45909091.

It is not a weakly prime, because it can be changed into another prime (45901091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22954545 + 22954546.

It is an arithmetic number, because the mean of its divisors is an integer number (22954546).

Almost surely, 2^45909091 is an apocalyptic number.

45909091 is a deficient number, since it is larger than the sum of its proper divisors (1).

45909091 is an equidigital number, since it uses as much as digits as its factorization.

45909091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 45909091 is about 6775.6247682409. The cubic root of 45909091 is about 358.0685942655.

It can be divided in two parts, 4 and 5909091, that added together give a palindrome (5909095).

The spelling of 45909091 in words is "forty-five million, nine hundred nine thousand, ninety-one".