75208981 has 2 divisors, whose sum is σ = 75208982. Its totient is φ = 75208980.

The previous prime is 75208963. The next prime is 75208997. The reversal of 75208981 is 18980257.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69872881 + 5336100 = 8359^2 + 2310^2 .

It is an emirp because it is prime and its reverse (18980257) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75208981 - 2¹¹ = 75206933 is a prime.

It is a super-2 number, since 2×75208981² = 11312781646116722, which contains 22 as substring.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 75208981 parts by 12264 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75200981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37604490 + 37604491.

It is an arithmetic number, because the mean of its divisors is an integer number (37604491).

Almost surely, 2^75208981 is an apocalyptic number.

It is an amenable number.

75208981 is a deficient number, since it is larger than the sum of its proper divisors (1).

75208981 is an equidigital number, since it uses as much as digits as its factorization.

75208981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 75208981 is about 8672.3111683103. The cubic root of 75208981 is about 422.1076614118.

The spelling of 75208981 in words is "seventy-five million, two hundred eight thousand, nine hundred eighty-one".