611652989 has 4 divisors (see below), whose sum is σ = 612457500. Its totient is φ = 610848480.

The previous prime is 611652973. The next prime is 611653079. The reversal of 611652989 is 989256116.

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 2402500 + 609250489 = 1550^2 + 24683^2 .

It is a cyclic number.

It is not a de Polignac number, because 611652989 - 2⁴ = 611652973 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 (611652089) 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, 401114 + ... + 402635.

It is an arithmetic number, because the mean of its divisors is an integer number (153114375).

Almost surely, 2^611652989 is an apocalyptic number.

It is an amenable number.

611652989 is a deficient number, since it is larger than the sum of its proper divisors (804511).

611652989 is an equidigital number, since it uses as much as digits as its factorization.

611652989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804510.

The product of its digits is 233280, while the sum is 47.

The square root of 611652989 is about 24731.6192150858. The cubic root of 611652989 is about 848.8579768102.

The spelling of 611652989 in words is "six hundred eleven million, six hundred fifty-two thousand, nine hundred eighty-nine".