61309119 has 4 divisors (see below), whose sum is σ = 81745496. Its totient is φ = 40872744.

The previous prime is 61309117. The next prime is 61309133. The reversal of 61309119 is 91190316.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61309119 - 2¹ = 61309117 is a prime.

It is a super-2 number, since 2×61309119² = 7517616145112322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61309117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10218184 + ... + 10218189.

It is an arithmetic number, because the mean of its divisors is an integer number (20436374).

Almost surely, 2^61309119 is an apocalyptic number.

61309119 is a deficient number, since it is larger than the sum of its proper divisors (20436377).

61309119 is a wasteful number, since it uses less digits than its factorization.

61309119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20436376.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 61309119 is about 7830.0139846618. The cubic root of 61309119 is about 394.3135414655.

The spelling of 61309119 in words is "sixty-one million, three hundred nine thousand, one hundred nineteen".