75378911 has 4 divisors (see below), whose sum is σ = 75659400. Its totient is φ = 75098424.

The previous prime is 75378893. The next prime is 75378923. The reversal of 75378911 is 11987357.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11987357 = 97 ⋅123581.

It is a cyclic number.

It is not a de Polignac number, because 75378911 - 2²⁶ = 8270047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75378211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139841 + ... + 140378.

It is an arithmetic number, because the mean of its divisors is an integer number (18914850).

Almost surely, 2^75378911 is an apocalyptic number.

75378911 is a deficient number, since it is larger than the sum of its proper divisors (280489).

75378911 is a wasteful number, since it uses less digits than its factorization.

75378911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280488.

The product of its digits is 52920, while the sum is 41.

The square root of 75378911 is about 8682.1029134651. The cubic root of 75378911 is about 422.4253309217.

The spelling of 75378911 in words is "seventy-five million, three hundred seventy-eight thousand, nine hundred eleven".