45991247 has 2 divisors, whose sum is σ = 45991248. Its totient is φ = 45991246.

The previous prime is 45991243. The next prime is 45991261. The reversal of 45991247 is 74219954.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45991247 - 2² = 45991243 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45991243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22995623 + 22995624.

It is an arithmetic number, because the mean of its divisors is an integer number (22995624).

Almost surely, 2^45991247 is an apocalyptic number.

45991247 is a deficient number, since it is larger than the sum of its proper divisors (1).

45991247 is an equidigital number, since it uses as much as digits as its factorization.

45991247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 45991247 is about 6781.6846727049. The cubic root of 45991247 is about 358.2820592701.

The spelling of 45991247 in words is "forty-five million, nine hundred ninety-one thousand, two hundred forty-seven".