611689429 has 4 divisors (see below), whose sum is σ = 658742476. Its totient is φ = 564636384.

The previous prime is 611689399. The next prime is 611689447. The reversal of 611689429 is 924986116.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70056900 + 541632529 = 8370^2 + 23273^2 .

It is not a de Polignac number, because 611689429 - 2¹⁹ = 611165141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611689459) 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, 23526504 + ... + 23526529.

It is an arithmetic number, because the mean of its divisors is an integer number (164685619).

Almost surely, 2^611689429 is an apocalyptic number.

It is an amenable number.

611689429 is a deficient number, since it is larger than the sum of its proper divisors (47053047).

611689429 is a wasteful number, since it uses less digits than its factorization.

611689429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47053046.

The product of its digits is 186624, while the sum is 46.

The square root of 611689429 is about 24732.3559128523. The cubic root of 611689429 is about 848.8748337378.

The spelling of 611689429 in words is "six hundred eleven million, six hundred eighty-nine thousand, four hundred twenty-nine".