61099601 has 2 divisors, whose sum is σ = 61099602. Its totient is φ = 61099600.

The previous prime is 61099589. The next prime is 61099663. The reversal of 61099601 is 10699016.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45576001 + 15523600 = 6751^2 + 3940^2 .It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 10966019 and 91066901.

It is a cyclic number.

It is not a de Polignac number, because 61099601 - 2¹⁰ = 61098577 is a prime.

It is a super-2 number, since 2×61099601² = 7466322484718402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61099501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30549800 + 30549801.

It is an arithmetic number, because the mean of its divisors is an integer number (30549801).

Almost surely, 2^61099601 is an apocalyptic number.

It is an amenable number.

61099601 is a deficient number, since it is larger than the sum of its proper divisors (1).

61099601 is an equidigital number, since it uses as much as digits as its factorization.

61099601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 61099601 is about 7816.6233758574. The cubic root of 61099601 is about 393.8638526563.

The spelling of 61099601 in words is "sixty-one million, ninety-nine thousand, six hundred one".