121713287 has 2 divisors, whose sum is σ = 121713288. Its totient is φ = 121713286.

The previous prime is 121713233. The next prime is 121713299. The reversal of 121713287 is 782317121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121713287 - 2²⁰ = 120664711 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121713227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60856643 + 60856644.

It is an arithmetic number, because the mean of its divisors is an integer number (60856644).

Almost surely, 2^121713287 is an apocalyptic number.

121713287 is a deficient number, since it is larger than the sum of its proper divisors (1).

121713287 is an equidigital number, since it uses as much as digits as its factorization.

121713287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 32.

The square root of 121713287 is about 11032.3744950940. The cubic root of 121713287 is about 495.5787360841.

The spelling of 121713287 in words is "one hundred twenty-one million, seven hundred thirteen thousand, two hundred eighty-seven".