900978877 has 2 divisors, whose sum is σ = 900978878. Its totient is φ = 900978876.

The previous prime is 900978863. The next prime is 900978961. The reversal of 900978877 is 778879009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 894368836 + 6610041 = 29906^2 + 2571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900978877 is a prime.

It is a super-2 number, since 2×900978877² = 1623525873600362258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900978817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450489438 + 450489439.

It is an arithmetic number, because the mean of its divisors is an integer number (450489439).

Almost surely, 2^900978877 is an apocalyptic number.

It is an amenable number.

900978877 is a deficient number, since it is larger than the sum of its proper divisors (1).

900978877 is an equidigital number, since it uses as much as digits as its factorization.

900978877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 55.

The square root of 900978877 is about 30016.3101829655. The cubic root of 900978877 is about 965.8392930937.

The spelling of 900978877 in words is "nine hundred million, nine hundred seventy-eight thousand, eight hundred seventy-seven".