901878869 has 2 divisors, whose sum is σ = 901878870. Its totient is φ = 901878868.

The previous prime is 901878853. The next prime is 901878881. The reversal of 901878869 is 968878109.

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., 898500625 + 3378244 = 29975^2 + 1838^2 .

It is an emirp because it is prime and its reverse (968878109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 901878869 - 2⁴ = 901878853 is a prime.

It is a super-2 number, since 2×901878869² = 1626770988697438322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (901478869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450939434 + 450939435.

It is an arithmetic number, because the mean of its divisors is an integer number (450939435).

Almost surely, 2^901878869 is an apocalyptic number.

It is an amenable number.

901878869 is a deficient number, since it is larger than the sum of its proper divisors (1).

901878869 is an equidigital number, since it uses as much as digits as its factorization.

901878869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The square root of 901878869 is about 30031.2981570894. The cubic root of 901878869 is about 966.1607798632.

The spelling of 901878869 in words is "nine hundred one million, eight hundred seventy-eight thousand, eight hundred sixty-nine".