75121499 has 2 divisors, whose sum is σ = 75121500. Its totient is φ = 75121498.

The previous prime is 75121489. The next prime is 75121537. The reversal of 75121499 is 99412157.

It is an a-pointer prime, because the next prime (75121537) can be obtained adding 75121499 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75121499 - 2¹² = 75117403 is a prime.

It is a super-2 number, since 2×75121499² = 11286479224014002, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (75121469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37560749 + 37560750.

It is an arithmetic number, because the mean of its divisors is an integer number (37560750).

Almost surely, 2^75121499 is an apocalyptic number.

75121499 is a deficient number, since it is larger than the sum of its proper divisors (1).

75121499 is an equidigital number, since it uses as much as digits as its factorization.

75121499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 38.

The square root of 75121499 is about 8667.2659472293. The cubic root of 75121499 is about 421.9439347363.

The spelling of 75121499 in words is "seventy-five million, one hundred twenty-one thousand, four hundred ninety-nine".