75620431 has 4 divisors (see below), whose sum is σ = 76327272. Its totient is φ = 74913592.

The previous prime is 75620411. The next prime is 75620449. The reversal of 75620431 is 13402657.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13402657 = 19 ⋅705403.

It is a cyclic number.

It is not a de Polignac number, because 75620431 - 2⁹ = 75619919 is a prime.

It is a super-2 number, since 2×75620431² = 11436899169251522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75620431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75620411) 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 3 ways as a sum of consecutive naturals, for example, 353260 + ... + 353473.

It is an arithmetic number, because the mean of its divisors is an integer number (19081818).

Almost surely, 2^75620431 is an apocalyptic number.

75620431 is a deficient number, since it is larger than the sum of its proper divisors (706841).

75620431 is a wasteful number, since it uses less digits than its factorization.

75620431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706840.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 75620431 is about 8696.0008624655. Note that the first 3 decimals coincide. The cubic root of 75620431 is about 422.8760113291.

The spelling of 75620431 in words is "seventy-five million, six hundred twenty thousand, four hundred thirty-one".