118787621 has 2 divisors, whose sum is σ = 118787622. Its totient is φ = 118787620.

The previous prime is 118787611. The next prime is 118787633. The reversal of 118787621 is 126787811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108451396 + 10336225 = 10414^2 + 3215^2 .

It is a cyclic number.

It is not a de Polignac number, because 118787621 - 2²² = 114593317 is a prime.

It is a super-2 number, since 2×118787621² = 28220997805679282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118787611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59393810 + 59393811.

It is an arithmetic number, because the mean of its divisors is an integer number (59393811).

Almost surely, 2^118787621 is an apocalyptic number.

It is an amenable number.

118787621 is a deficient number, since it is larger than the sum of its proper divisors (1).

118787621 is an equidigital number, since it uses as much as digits as its factorization.

118787621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 41.

The square root of 118787621 is about 10898.9733920218. The cubic root of 118787621 is about 491.5756870568.

The spelling of 118787621 in words is "one hundred eighteen million, seven hundred eighty-seven thousand, six hundred twenty-one".