611734021 has 2 divisors, whose sum is σ = 611734022. Its totient is φ = 611734020.

The previous prime is 611733979. The next prime is 611734031. The reversal of 611734021 is 120437116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 476941921 + 134792100 = 21839^2 + 11610^2 .

It is a cyclic number.

It is not a de Polignac number, because 611734021 - 2¹⁵ = 611701253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611734031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305867010 + 305867011.

It is an arithmetic number, because the mean of its divisors is an integer number (305867011).

Almost surely, 2^611734021 is an apocalyptic number.

It is an amenable number.

611734021 is a deficient number, since it is larger than the sum of its proper divisors (1).

611734021 is an equidigital number, since it uses as much as digits as its factorization.

611734021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 611734021 is about 24733.2573875743. The cubic root of 611734021 is about 848.8954608213.

The spelling of 611734021 in words is "six hundred eleven million, seven hundred thirty-four thousand, twenty-one".