61099613 has 8 divisors (see below), whose sum is σ = 62956536. Its totient is φ = 59270400.

The previous prime is 61099601. The next prime is 61099663. The reversal of 61099613 is 31699016.

It can be written as a sum of positive squares in 4 ways, for example, as 56644 + 61042969 = 238^2 + 7813^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61099613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61099663) 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, 2408 + ... + 11313.

It is an arithmetic number, because the mean of its divisors is an integer number (7869567).

Almost surely, 2^61099613 is an apocalyptic number.

It is an amenable number.

61099613 is a deficient number, since it is larger than the sum of its proper divisors (1856923).

61099613 is a wasteful number, since it uses less digits than its factorization.

61099613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13855.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 61099613 is about 7816.6241434522. The cubic root of 61099613 is about 393.8638784413.

The spelling of 61099613 in words is "sixty-one million, ninety-nine thousand, six hundred thirteen".