75269981 has 2 divisors, whose sum is σ = 75269982. Its totient is φ = 75269980.

The previous prime is 75269941. The next prime is 75269989. The reversal of 75269981 is 18996257.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68326756 + 6943225 = 8266^2 + 2635^2 .

It is a cyclic number.

It is not a de Polignac number, because 75269981 - 2⁶ = 75269917 is a prime.

It is a super-2 number, since 2×75269981² = 11331140079480722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75269989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37634990 + 37634991.

It is an arithmetic number, because the mean of its divisors is an integer number (37634991).

Almost surely, 2^75269981 is an apocalyptic number.

It is an amenable number.

75269981 is a deficient number, since it is larger than the sum of its proper divisors (1).

75269981 is an equidigital number, since it uses as much as digits as its factorization.

75269981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 47.

The square root of 75269981 is about 8675.8273957012. The cubic root of 75269981 is about 422.2217506638.

The spelling of 75269981 in words is "seventy-five million, two hundred sixty-nine thousand, nine hundred eighty-one".