45681397 has 4 divisors (see below), whose sum is σ = 48368556. Its totient is φ = 42994240.

The previous prime is 45681371. The next prime is 45681413. The reversal of 45681397 is 79318654.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31798321 + 13883076 = 5639^2 + 3726^2 .

It is a cyclic number.

It is not a de Polignac number, because 45681397 - 2⁷ = 45681269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45681367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343554 + ... + 1343587.

It is an arithmetic number, because the mean of its divisors is an integer number (12092139).

Almost surely, 2^45681397 is an apocalyptic number.

It is an amenable number.

45681397 is a deficient number, since it is larger than the sum of its proper divisors (2687159).

45681397 is a wasteful number, since it uses less digits than its factorization.

45681397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687158.

The product of its digits is 181440, while the sum is 43.

The square root of 45681397 is about 6758.8014470023. The cubic root of 45681397 is about 357.4756453978.

The spelling of 45681397 in words is "forty-five million, six hundred eighty-one thousand, three hundred ninety-seven".