75081969 has 18 divisors (see below), whose sum is σ = 112075938. Its totient is φ = 48434400.

The previous prime is 75081949. The next prime is 75081989. The reversal of 75081969 is 96918057.

It is an interprime number because it is at equal distance from previous prime (75081949) and next prime (75081989).

It can be written as a sum of positive squares in only one way, i.e., 71622369 + 3459600 = 8463^2 + 1860^2 .

It is not a de Polignac number, because 75081969 - 2²⁵ = 41527537 is a prime.

It is a super-2 number, since 2×75081969² = 11274604137833922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75081949) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4309 + ... + 12989.

It is an arithmetic number, because the mean of its divisors is an integer number (6226441).

Almost surely, 2^75081969 is an apocalyptic number.

It is an amenable number.

75081969 is a deficient number, since it is larger than the sum of its proper divisors (36993969).

75081969 is a wasteful number, since it uses less digits than its factorization.

75081969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8749 (or 8715 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 75081969 is about 8664.9852279159. The cubic root of 75081969 is about 421.8699107863.

The spelling of 75081969 in words is "seventy-five million, eighty-one thousand, nine hundred sixty-nine".