1611231679 has 2 divisors, whose sum is σ = 1611231680. Its totient is φ = 1611231678.

The previous prime is 1611231577. The next prime is 1611231701. The reversal of 1611231679 is 9761321161.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1611231679 - 2⁷ = 1611231551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1611231379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805615839 + 805615840.

It is an arithmetic number, because the mean of its divisors is an integer number (805615840).

Almost surely, 2^1611231679 is an apocalyptic number.

1611231679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611231679 is an equidigital number, since it uses as much as digits as its factorization.

1611231679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 1611231679 is about 40140.1504606049. The cubic root of 1611231679 is about 1172.3375185944.

It can be divided in two parts, 1611231 and 679, that added together give a triangular number (1611910 = T₁₇₉₅).

The spelling of 1611231679 in words is "one billion, six hundred eleven million, two hundred thirty-one thousand, six hundred seventy-nine".