103752721 has 2 divisors, whose sum is σ = 103752722. Its totient is φ = 103752720.

The previous prime is 103752707. The next prime is 103752731. The reversal of 103752721 is 127257301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103734225 + 18496 = 10185^2 + 136^2 .

It is an emirp because it is prime and its reverse (127257301) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103752721 is a prime.

It is a super-2 number, since 2×103752721² = 21529254229807682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 103752721.

It is not a weakly prime, because it can be changed into another prime (103752731) 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, 51876360 + 51876361.

It is an arithmetic number, because the mean of its divisors is an integer number (51876361).

Almost surely, 2^103752721 is an apocalyptic number.

It is an amenable number.

103752721 is a deficient number, since it is larger than the sum of its proper divisors (1).

103752721 is an equidigital number, since it uses as much as digits as its factorization.

103752721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 103752721 is about 10185.9079614927. The cubic root of 103752721 is about 469.8939265678.

The spelling of 103752721 in words is "one hundred three million, seven hundred fifty-two thousand, seven hundred twenty-one".