1613928387 has 32 divisors (see below), whose sum is σ = 2323702080. Its totient is φ = 994273280.

The previous prime is 1613928383. The next prime is 1613928397. The reversal of 1613928387 is 7838293161.

It is a cyclic number.

It is not a de Polignac number, because 1613928387 - 2² = 1613928383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1613928383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 184783 + ... + 193319.

It is an arithmetic number, because the mean of its divisors is an integer number (72615690).

Almost surely, 2^1613928387 is an apocalyptic number.

1613928387 is a deficient number, since it is larger than the sum of its proper divisors (709773693).

1613928387 is a wasteful number, since it uses less digits than its factorization.

1613928387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8663.

The product of its digits is 435456, while the sum is 48.

The square root of 1613928387 is about 40173.7275716357. The cubic root of 1613928387 is about 1172.9911986077.

The spelling of 1613928387 in words is "one billion, six hundred thirteen million, nine hundred twenty-eight thousand, three hundred eighty-seven".