40251793 has 2 divisors, whose sum is σ = 40251794. Its totient is φ = 40251792.

The previous prime is 40251781. The next prime is 40251803. The reversal of 40251793 is 39715204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36687249 + 3564544 = 6057^2 + 1888^2 .

It is a cyclic number.

It is not a de Polignac number, because 40251793 - 2¹³ = 40243601 is a prime.

It is not a weakly prime, because it can be changed into another prime (40251703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20125896 + 20125897.

It is an arithmetic number, because the mean of its divisors is an integer number (20125897).

Almost surely, 2^40251793 is an apocalyptic number.

It is an amenable number.

40251793 is a deficient number, since it is larger than the sum of its proper divisors (1).

40251793 is an equidigital number, since it uses as much as digits as its factorization.

40251793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 40251793 is about 6344.4300768469. The cubic root of 40251793 is about 342.7112888129.

Adding to 40251793 its reverse (39715204), we get a palindrome (79966997).

The spelling of 40251793 in words is "forty million, two hundred fifty-one thousand, seven hundred ninety-three".