121993519 has 2 divisors, whose sum is σ = 121993520. Its totient is φ = 121993518.

The previous prime is 121993507. The next prime is 121993561. The reversal of 121993519 is 915399121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121993519 - 2¹³ = 121985327 is a prime.

It is a super-2 number, since 2×121993519² = 29764837356006722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121993019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60996759 + 60996760.

It is an arithmetic number, because the mean of its divisors is an integer number (60996760).

Almost surely, 2^121993519 is an apocalyptic number.

121993519 is a deficient number, since it is larger than the sum of its proper divisors (1).

121993519 is an equidigital number, since it uses as much as digits as its factorization.

121993519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21870, while the sum is 40.

The square root of 121993519 is about 11045.0676322058. The cubic root of 121993519 is about 495.9587838085.

The spelling of 121993519 in words is "one hundred twenty-one million, nine hundred ninety-three thousand, five hundred nineteen".