1613764091 has 4 divisors (see below), whose sum is σ = 1613857800. Its totient is φ = 1613670384.

The previous prime is 1613764067. The next prime is 1613764121. The reversal of 1613764091 is 1904673161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1613764091 - 2⁶ = 1613764027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1613764001) 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, 12746 + ... + 58223.

It is an arithmetic number, because the mean of its divisors is an integer number (403464450).

Almost surely, 2^1613764091 is an apocalyptic number.

1613764091 is a deficient number, since it is larger than the sum of its proper divisors (93709).

1613764091 is an equidigital number, since it uses as much as digits as its factorization.

1613764091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93708.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 1613764091 is about 40171.6827006288. The cubic root of 1613764091 is about 1172.9513942184.

The spelling of 1613764091 in words is "one billion, six hundred thirteen million, seven hundred sixty-four thousand, ninety-one".