45978091 has 2 divisors, whose sum is σ = 45978092. Its totient is φ = 45978090.

The previous prime is 45978089. The next prime is 45978143. The reversal of 45978091 is 19087954.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45978091 - 2¹ = 45978089 is a prime.

It is a super-2 number, since 2×45978091² = 4227969704008562, which contains 22 as substring.

Together with 45978089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (45978011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22989045 + 22989046.

It is an arithmetic number, because the mean of its divisors is an integer number (22989046).

Almost surely, 2^45978091 is an apocalyptic number.

45978091 is a deficient number, since it is larger than the sum of its proper divisors (1).

45978091 is an equidigital number, since it uses as much as digits as its factorization.

45978091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 45978091 is about 6780.7146378534. The cubic root of 45978091 is about 358.2478932886.

The spelling of 45978091 in words is "forty-five million, nine hundred seventy-eight thousand, ninety-one".