113620981 has 2 divisors, whose sum is σ = 113620982. Its totient is φ = 113620980.

The previous prime is 113620957. The next prime is 113620999. The reversal of 113620981 is 189026311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102697956 + 10923025 = 10134^2 + 3305^2 .

It is an emirp because it is prime and its reverse (189026311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113620981 - 2¹³ = 113612789 is a prime.

It is a super-2 number, since 2×113620981² = 25819454646804722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113620901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56810490 + 56810491.

It is an arithmetic number, because the mean of its divisors is an integer number (56810491).

Almost surely, 2^113620981 is an apocalyptic number.

It is an amenable number.

113620981 is a deficient number, since it is larger than the sum of its proper divisors (1).

113620981 is an equidigital number, since it uses as much as digits as its factorization.

113620981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 113620981 is about 10659.3142837614. The cubic root of 113620981 is about 484.3427963939.

The spelling of 113620981 in words is "one hundred thirteen million, six hundred twenty thousand, nine hundred eighty-one".