75191994 has 12 divisors (see below), whose sum is σ = 162916026. Its totient is φ = 25063992.

The previous prime is 75191929. The next prime is 75191999. The reversal of 75191994 is 49919157.

It can be written as a sum of positive squares in only one way, i.e., 40793769 + 34398225 = 6387^2 + 5865^2 .

It is not an unprimeable number, because it can be changed into a prime (75191999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2088649 + ... + 2088684.

Almost surely, 2^75191994 is an apocalyptic number.

75191994 is an abundant number, since it is smaller than the sum of its proper divisors (87724032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75191994 is a wasteful number, since it uses less digits than its factorization.

75191994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4177341 (or 4177338 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 75191994 is about 8671.3317316315. The cubic root of 75191994 is about 422.0758793797.

The spelling of 75191994 in words is "seventy-five million, one hundred ninety-one thousand, nine hundred ninety-four".