620407477 has 4 divisors (see below), whose sum is σ = 620689036. Its totient is φ = 620125920.

The previous prime is 620407409. The next prime is 620407511. The reversal of 620407477 is 774704026.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 511392996 + 109014481 = 22614^2 + 10441^2 .

It is a cyclic number.

It is not a de Polignac number, because 620407477 - 2⁷ = 620407349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620405477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137448 + ... + 141889.

It is an arithmetic number, because the mean of its divisors is an integer number (155172259).

Almost surely, 2^620407477 is an apocalyptic number.

It is an amenable number.

620407477 is a deficient number, since it is larger than the sum of its proper divisors (281559).

620407477 is a wasteful number, since it uses less digits than its factorization.

620407477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281558.

The product of its (nonzero) digits is 65856, while the sum is 37.

The square root of 620407477 is about 24907.9801870806. The cubic root of 620407477 is about 852.8886619414. Note that the first 3 decimals are identical.

The spelling of 620407477 in words is "six hundred twenty million, four hundred seven thousand, four hundred seventy-seven".