1613920877 has 2 divisors, whose sum is σ = 1613920878. Its totient is φ = 1613920876.

The previous prime is 1613920837. The next prime is 1613920883. The reversal of 1613920877 is 7780293161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 848789956 + 765130921 = 29134^2 + 27661^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613920877 - 2¹² = 1613916781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1613920837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806960438 + 806960439.

It is an arithmetic number, because the mean of its divisors is an integer number (806960439).

Almost surely, 2^1613920877 is an apocalyptic number.

It is an amenable number.

1613920877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613920877 is an equidigital number, since it uses as much as digits as its factorization.

1613920877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 1613920877 is about 40173.6341024807. The cubic root of 1613920877 is about 1172.9893792008.

The spelling of 1613920877 in words is "one billion, six hundred thirteen million, nine hundred twenty thousand, eight hundred seventy-seven".