620761247 has 4 divisors (see below), whose sum is σ = 637538616. Its totient is φ = 603983880.

The previous prime is 620761199. The next prime is 620761259. The reversal of 620761247 is 742167026.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742167026 = 2 ⋅371083513.

It is a cyclic number.

It is not a de Polignac number, because 620761247 - 2²⁰ = 619712671 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 (620761277) 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, 8388629 + ... + 8388702.

It is an arithmetic number, because the mean of its divisors is an integer number (159384654).

Almost surely, 2^620761247 is an apocalyptic number.

620761247 is a deficient number, since it is larger than the sum of its proper divisors (16777369).

620761247 is a wasteful number, since it uses less digits than its factorization.

620761247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16777368.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 620761247 is about 24915.0807142983. The cubic root of 620761247 is about 853.0507431009.

The spelling of 620761247 in words is "six hundred twenty million, seven hundred sixty-one thousand, two hundred forty-seven".