75533997 has 32 divisors (see below), whose sum is σ = 126895104. Its totient is φ = 38822400.

The previous prime is 75533977. The next prime is 75533999. The reversal of 75533997 is 79933557.

It is not a de Polignac number, because 75533997 - 2⁸ = 75533741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75533999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20722 + ... + 24092.

It is an arithmetic number, because the mean of its divisors is an integer number (3965472).

Almost surely, 2^75533997 is an apocalyptic number.

75533997 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

75533997 is a deficient number, since it is larger than the sum of its proper divisors (51361107).

75533997 is a wasteful number, since it uses less digits than its factorization.

75533997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489.

The product of its digits is 893025, while the sum is 48.

The square root of 75533997 is about 8691.0296858312. The cubic root of 75533997 is about 422.7148344294.

The spelling of 75533997 in words is "seventy-five million, five hundred thirty-three thousand, nine hundred ninety-seven".