75121697 has 16 divisors (see below), whose sum is σ = 87045504. Its totient is φ = 63504000.

The previous prime is 75121667. The next prime is 75121721. The reversal of 75121697 is 79612157.

It is not a de Polignac number, because 75121697 - 2⁶ = 75121633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75121697.

It is not an unprimeable number, because it can be changed into a prime (75121667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267197 + ... + 267477.

It is an arithmetic number, because the mean of its divisors is an integer number (5440344).

Almost surely, 2^75121697 is an apocalyptic number.

It is an amenable number.

75121697 is a deficient number, since it is larger than the sum of its proper divisors (11923807).

75121697 is a wasteful number, since it uses less digits than its factorization.

75121697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680.

The product of its digits is 26460, while the sum is 38.

The square root of 75121697 is about 8667.2773695088. The cubic root of 75121697 is about 421.9443054461.

The spelling of 75121697 in words is "seventy-five million, one hundred twenty-one thousand, six hundred ninety-seven".