621145607 has 2 divisors, whose sum is σ = 621145608. Its totient is φ = 621145606.

The previous prime is 621145589. The next prime is 621145627. The reversal of 621145607 is 706541126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621145607 - 2⁸ = 621145351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621145627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310572803 + 310572804.

It is an arithmetic number, because the mean of its divisors is an integer number (310572804).

Almost surely, 2^621145607 is an apocalyptic number.

621145607 is a deficient number, since it is larger than the sum of its proper divisors (1).

621145607 is an equidigital number, since it uses as much as digits as its factorization.

621145607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 621145607 is about 24922.7929213401. The cubic root of 621145607 is about 853.2267694111.

The spelling of 621145607 in words is "six hundred twenty-one million, one hundred forty-five thousand, six hundred seven".