874814981 has 2 divisors, whose sum is σ = 874814982. Its totient is φ = 874814980.

The previous prime is 874814933. The next prime is 874815023. The reversal of 874814981 is 189418478.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841522081 + 33292900 = 29009^2 + 5770^2 .

It is a cyclic number.

It is not a de Polignac number, because 874814981 - 2¹⁰ = 874813957 is a prime.

It is a super-2 number, since 2×874814981² = 1530602501964060722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (874814911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 437407490 + 437407491.

It is an arithmetic number, because the mean of its divisors is an integer number (437407491).

Almost surely, 2^874814981 is an apocalyptic number.

It is an amenable number.

874814981 is a deficient number, since it is larger than the sum of its proper divisors (1).

874814981 is an equidigital number, since it uses as much as digits as its factorization.

874814981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 50.

The square root of 874814981 is about 29577.2713582575. The cubic root of 874814981 is about 956.3981716598.

The spelling of 874814981 in words is "eight hundred seventy-four million, eight hundred fourteen thousand, nine hundred eighty-one".