75703921 has 2 divisors, whose sum is σ = 75703922. Its totient is φ = 75703920.

The previous prime is 75703919. The next prime is 75703937. The reversal of 75703921 is 12930757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48455521 + 27248400 = 6961^2 + 5220^2 .

It is a cyclic number.

It is not a de Polignac number, because 75703921 - 2¹ = 75703919 is a prime.

Together with 75703919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (75103921) 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, 37851960 + 37851961.

It is an arithmetic number, because the mean of its divisors is an integer number (37851961).

Almost surely, 2^75703921 is an apocalyptic number.

It is an amenable number.

75703921 is a deficient number, since it is larger than the sum of its proper divisors (1).

75703921 is an equidigital number, since it uses as much as digits as its factorization.

75703921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 75703921 is about 8700.8000206878. The cubic root of 75703921 is about 423.0315818644.

The spelling of 75703921 in words is "seventy-five million, seven hundred three thousand, nine hundred twenty-one".