45173731 has 2 divisors, whose sum is σ = 45173732. Its totient is φ = 45173730.

The previous prime is 45173729. The next prime is 45173741. The reversal of 45173731 is 13737154.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45173731 - 2¹ = 45173729 is a prime.

It is a super-3 number, since 3×45173731³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 45173729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 45173693 and 45173702.

It is not a weakly prime, because it can be changed into another prime (45173741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22586865 + 22586866.

It is an arithmetic number, because the mean of its divisors is an integer number (22586866).

Almost surely, 2^45173731 is an apocalyptic number.

45173731 is a deficient number, since it is larger than the sum of its proper divisors (1).

45173731 is an equidigital number, since it uses as much as digits as its factorization.

45173731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 31.

The square root of 45173731 is about 6721.1406026061. The cubic root of 45173731 is about 356.1464779333.

The spelling of 45173731 in words is "forty-five million, one hundred seventy-three thousand, seven hundred thirty-one".