45919381 has 2 divisors, whose sum is σ = 45919382. Its totient is φ = 45919380.

The previous prime is 45919361. The next prime is 45919387. The reversal of 45919381 is 18391954.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45778756 + 140625 = 6766^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 45919381 - 2¹³ = 45911189 is a prime.

It is a super-2 number, since 2×45919381² = 4217179102846322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45919387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22959690 + 22959691.

It is an arithmetic number, because the mean of its divisors is an integer number (22959691).

Almost surely, 2^45919381 is an apocalyptic number.

It is an amenable number.

45919381 is a deficient number, since it is larger than the sum of its proper divisors (1).

45919381 is an equidigital number, since it uses as much as digits as its factorization.

45919381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 45919381 is about 6776.3840652667. The cubic root of 45919381 is about 358.0953445997.

The spelling of 45919381 in words is "forty-five million, nine hundred nineteen thousand, three hundred eighty-one".