75921899 has 2 divisors, whose sum is σ = 75921900. Its totient is φ = 75921898.

The previous prime is 75921887. The next prime is 75921953. The reversal of 75921899 is 99812957.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (99812957) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75921899 is a prime.

It is not a weakly prime, because it can be changed into another prime (75921869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37960949 + 37960950.

It is an arithmetic number, because the mean of its divisors is an integer number (37960950).

Almost surely, 2^75921899 is an apocalyptic number.

75921899 is a deficient number, since it is larger than the sum of its proper divisors (1).

75921899 is an equidigital number, since it uses as much as digits as its factorization.

75921899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 50.

The square root of 75921899 is about 8713.3173361241. The cubic root of 75921899 is about 423.4372113005.

The spelling of 75921899 in words is "seventy-five million, nine hundred twenty-one thousand, eight hundred ninety-nine".