904771997 has 2 divisors, whose sum is σ = 904771998. Its totient is φ = 904771996.

The previous prime is 904771951. The next prime is 904772017. The reversal of 904771997 is 799177409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 598731961 + 306040036 = 24469^2 + 17494^2 .

It is a cyclic number.

It is not a de Polignac number, because 904771997 - 2¹⁰ = 904770973 is a prime.

It is a super-2 number, since 2×904771997² = 1637224733110736018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (904771937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452385998 + 452385999.

It is an arithmetic number, because the mean of its divisors is an integer number (452385999).

Almost surely, 2^904771997 is an apocalyptic number.

It is an amenable number.

904771997 is a deficient number, since it is larger than the sum of its proper divisors (1).

904771997 is an equidigital number, since it uses as much as digits as its factorization.

904771997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000188, while the sum is 53.

The square root of 904771997 is about 30079.4281361864. The cubic root of 904771997 is about 967.1927895523.

The spelling of 904771997 in words is "nine hundred four million, seven hundred seventy-one thousand, nine hundred ninety-seven".