45390491 has 2 divisors, whose sum is σ = 45390492. Its totient is φ = 45390490.

The previous prime is 45390473. The next prime is 45390509. The reversal of 45390491 is 19409354.

It is a balanced prime because it is at equal distance from previous prime (45390473) and next prime (45390509).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45390491 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45390421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22695245 + 22695246.

It is an arithmetic number, because the mean of its divisors is an integer number (22695246).

Almost surely, 2^45390491 is an apocalyptic number.

45390491 is a deficient number, since it is larger than the sum of its proper divisors (1).

45390491 is an equidigital number, since it uses as much as digits as its factorization.

45390491 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 35.

The square root of 45390491 is about 6737.2465443978. The cubic root of 45390491 is about 356.7152093750.

The spelling of 45390491 in words is "forty-five million, three hundred ninety thousand, four hundred ninety-one".