107540821 has 2 divisors, whose sum is σ = 107540822. Its totient is φ = 107540820.

The previous prime is 107540813. The next prime is 107540837. The reversal of 107540821 is 128045701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90820900 + 16719921 = 9530^2 + 4089^2 .

It is a cyclic number.

It is not a de Polignac number, because 107540821 - 2³ = 107540813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 107540821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (107544821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53770410 + 53770411.

It is an arithmetic number, because the mean of its divisors is an integer number (53770411).

Almost surely, 2^107540821 is an apocalyptic number.

It is an amenable number.

107540821 is a deficient number, since it is larger than the sum of its proper divisors (1).

107540821 is an equidigital number, since it uses as much as digits as its factorization.

107540821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 107540821 is about 10370.1890532430. The cubic root of 107540821 is about 475.5444482874.

The spelling of 107540821 in words is "one hundred seven million, five hundred forty thousand, eight hundred twenty-one".