620137081 has 8 divisors (see below), whose sum is σ = 624259584. Its totient is φ = 616024080.

The previous prime is 620137069. The next prime is 620137093. The reversal of 620137081 is 180731026.

It is an interprime number because it is at equal distance from previous prime (620137069) and next prime (620137093).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 620137081 - 2¹⁹ = 619612793 is a prime.

It is a super-2 number, since 2×620137081² = 769139998462401122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620137031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166815 + ... + 170491.

It is an arithmetic number, because the mean of its divisors is an integer number (78032448).

Almost surely, 2^620137081 is an apocalyptic number.

It is an amenable number.

620137081 is a deficient number, since it is larger than the sum of its proper divisors (4122503).

620137081 is a wasteful number, since it uses less digits than its factorization.

620137081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 620137081 is about 24902.5516965631. The cubic root of 620137081 is about 852.7647373686.

The spelling of 620137081 in words is "six hundred twenty million, one hundred thirty-seven thousand, eighty-one".