75725537 has 4 divisors (see below), whose sum is σ = 77486640. Its totient is φ = 73964436.

The previous prime is 75725519. The next prime is 75725539. The reversal of 75725537 is 73552757.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75725537 - 2⁶ = 75725473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75725494 and 75725503.

It is not an unprimeable number, because it can be changed into a prime (75725539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880487 + ... + 880572.

It is an arithmetic number, because the mean of its divisors is an integer number (19371660).

Almost surely, 2^75725537 is an apocalyptic number.

It is an amenable number.

75725537 is a deficient number, since it is larger than the sum of its proper divisors (1761103).

75725537 is a wasteful number, since it uses less digits than its factorization.

75725537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761102.

The product of its digits is 257250, while the sum is 41.

The square root of 75725537 is about 8702.0421166528. The cubic root of 75725537 is about 423.0718412519.

The spelling of 75725537 in words is "seventy-five million, seven hundred twenty-five thousand, five hundred thirty-seven".