620689351 has 4 divisors (see below), whose sum is σ = 623905552. Its totient is φ = 617473152.

The previous prime is 620689343. The next prime is 620689357. The reversal of 620689351 is 153986026.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153986026 = 2 ⋅76993013.

It is a cyclic number.

It is not a de Polignac number, because 620689351 - 2³ = 620689343 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 (620689357) 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, 1607811 + ... + 1608196.

It is an arithmetic number, because the mean of its divisors is an integer number (155976388).

Almost surely, 2^620689351 is an apocalyptic number.

620689351 is a deficient number, since it is larger than the sum of its proper divisors (3216201).

620689351 is a wasteful number, since it uses less digits than its factorization.

620689351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216200.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 620689351 is about 24913.6378515864. The cubic root of 620689351 is about 853.0178086438.

The spelling of 620689351 in words is "six hundred twenty million, six hundred eighty-nine thousand, three hundred fifty-one".