620607191 has 2 divisors, whose sum is σ = 620607192. Its totient is φ = 620607190.

The previous prime is 620607167. The next prime is 620607199. The reversal of 620607191 is 191706026.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620607191 - 2²² = 616412887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620607199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310303595 + 310303596.

It is an arithmetic number, because the mean of its divisors is an integer number (310303596).

Almost surely, 2^620607191 is an apocalyptic number.

620607191 is a deficient number, since it is larger than the sum of its proper divisors (1).

620607191 is an equidigital number, since it uses as much as digits as its factorization.

620607191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 620607191 is about 24911.9889009288. The cubic root of 620607191 is about 852.9801692913.

The spelling of 620607191 in words is "six hundred twenty million, six hundred seven thousand, one hundred ninety-one".