1613958121 has 8 divisors (see below), whose sum is σ = 1721944224. Its totient is φ = 1507421760.

The previous prime is 1613958113. The next prime is 1613958131. The reversal of 1613958121 is 1218593161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1613958121 - 2³ = 1613958113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1613958131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360135 + ... + 364588.

It is an arithmetic number, because the mean of its divisors is an integer number (215243028).

Almost surely, 2^1613958121 is an apocalyptic number.

It is an amenable number.

1613958121 is a deficient number, since it is larger than the sum of its proper divisors (107986103).

1613958121 is a wasteful number, since it uses less digits than its factorization.

1613958121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724871.

The product of its digits is 12960, while the sum is 37.

The square root of 1613958121 is about 40174.0976376570. The cubic root of 1613958121 is about 1172.9984020472.

The spelling of 1613958121 in words is "one billion, six hundred thirteen million, nine hundred fifty-eight thousand, one hundred twenty-one".