611729897 has 4 divisors (see below), whose sum is σ = 613434240. Its totient is φ = 610025556.

The previous prime is 611729893. The next prime is 611729927. The reversal of 611729897 is 798927116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 611729897 - 2² = 611729893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611729893) 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, 851633 + ... + 852350.

It is an arithmetic number, because the mean of its divisors is an integer number (153358560).

Almost surely, 2^611729897 is an apocalyptic number.

It is an amenable number.

611729897 is a deficient number, since it is larger than the sum of its proper divisors (1704343).

611729897 is a wasteful number, since it uses less digits than its factorization.

611729897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704342.

The product of its digits is 381024, while the sum is 50.

The square root of 611729897 is about 24733.1740179056. The cubic root of 611729897 is about 848.8935532097.

The spelling of 611729897 in words is "six hundred eleven million, seven hundred twenty-nine thousand, eight hundred ninety-seven".