620650961 has 8 divisors (see below), whose sum is σ = 709833600. Its totient is φ = 531597888.

The previous prime is 620650957. The next prime is 620650967. The reversal of 620650961 is 169056026.

It is a happy number.

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 620650961 - 2² = 620650957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620650967) 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, 21896 + ... + 41481.

It is an arithmetic number, because the mean of its divisors is an integer number (88729200).

Almost surely, 2^620650961 is an apocalyptic number.

It is an amenable number.

620650961 is a deficient number, since it is larger than the sum of its proper divisors (89182639).

620650961 is a wasteful number, since it uses less digits than its factorization.

620650961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64783.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 620650961 is about 24912.8673781241. The cubic root of 620650961 is about 853.0002217308. Note that the first 3 decimals are identical.

The spelling of 620650961 in words is "six hundred twenty million, six hundred fifty thousand, nine hundred sixty-one".