900781951 has 2 divisors, whose sum is σ = 900781952. Its totient is φ = 900781950.

The previous prime is 900781949. The next prime is 900781991. The reversal of 900781951 is 159187009.

It is a happy number.

It is an a-pointer prime, because the next prime (900781991) can be obtained adding 900781951 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 900781951 - 2¹ = 900781949 is a prime.

It is a super-2 number, since 2×900781951² = 1622816246494732802, which contains 22 as substring.

Together with 900781949, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900781991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450390975 + 450390976.

It is an arithmetic number, because the mean of its divisors is an integer number (450390976).

Almost surely, 2^900781951 is an apocalyptic number.

900781951 is a deficient number, since it is larger than the sum of its proper divisors (1).

900781951 is an equidigital number, since it uses as much as digits as its factorization.

900781951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 900781951 is about 30013.0296871209. The cubic root of 900781951 is about 965.7689204755.

It can be divided in two parts, 90078 and 1951, that added together give a palindrome (92029).

The spelling of 900781951 in words is "nine hundred million, seven hundred eighty-one thousand, nine hundred fifty-one".