620432347 has 4 divisors (see below), whose sum is σ = 620531920. Its totient is φ = 620332776.

The previous prime is 620432341. The next prime is 620432359. The reversal of 620432347 is 743234026.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 743234026 = 2 ⋅371617013.

It is a cyclic number.

It is not a de Polignac number, because 620432347 - 2³ = 620432339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620432341) 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, 39768 + ... + 53125.

It is an arithmetic number, because the mean of its divisors is an integer number (155132980).

Almost surely, 2^620432347 is an apocalyptic number.

620432347 is a deficient number, since it is larger than the sum of its proper divisors (99573).

620432347 is an equidigital number, since it uses as much as digits as its factorization.

620432347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99572.

The product of its (nonzero) digits is 24192, while the sum is 31.

The square root of 620432347 is about 24908.4794196675. The cubic root of 620432347 is about 852.9000582459.

The spelling of 620432347 in words is "six hundred twenty million, four hundred thirty-two thousand, three hundred forty-seven".