61109001 has 12 divisors (see below), whose sum is σ = 88350912. Its totient is φ = 40701336.

The previous prime is 61108981. The next prime is 61109021. The reversal of 61109001 is 10090116.

It is an interprime number because it is at equal distance from previous prime (61108981) and next prime (61109021).

It is not a de Polignac number, because 61109001 - 2⁶ = 61108937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61109021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9820 + ... + 14786.

It is an arithmetic number, because the mean of its divisors is an integer number (7362576).

Almost surely, 2^61109001 is an apocalyptic number.

It is an amenable number.

61109001 is a deficient number, since it is larger than the sum of its proper divisors (27241911).

61109001 is a wasteful number, since it uses less digits than its factorization.

61109001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6340 (or 6337 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 61109001 is about 7817.2246353805. The cubic root of 61109001 is about 393.8840498988.

Adding to 61109001 its reverse (10090116), we get a palindrome (71199117).

The spelling of 61109001 in words is "sixty-one million, one hundred nine thousand, one".