121613719 has 16 divisors (see below), whose sum is σ = 129153024. Its totient is φ = 114285600.

The previous prime is 121613677. The next prime is 121613729. The reversal of 121613719 is 917316121.

It is a cyclic number.

It is not a de Polignac number, because 121613719 - 2¹³ = 121605527 is a prime.

It is a super-2 number, since 2×121613719² = 29579793298021922, 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 (121613729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545242 + ... + 545464.

It is an arithmetic number, because the mean of its divisors is an integer number (8072064).

Almost surely, 2^121613719 is an apocalyptic number.

121613719 is a deficient number, since it is larger than the sum of its proper divisors (7539305).

121613719 is a wasteful number, since it uses less digits than its factorization.

121613719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558.

The product of its digits is 2268, while the sum is 31.

The square root of 121613719 is about 11027.8610346703. The cubic root of 121613719 is about 495.4435625512.

The spelling of 121613719 in words is "one hundred twenty-one million, six hundred thirteen thousand, seven hundred nineteen".