981415951 has 2 divisors, whose sum is σ = 981415952. Its totient is φ = 981415950.

The previous prime is 981415943. The next prime is 981415969. The reversal of 981415951 is 159514189.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981415951 - 2³ = 981415943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 981415898 and 981415907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981415901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490707975 + 490707976.

It is an arithmetic number, because the mean of its divisors is an integer number (490707976).

Almost surely, 2^981415951 is an apocalyptic number.

981415951 is a deficient number, since it is larger than the sum of its proper divisors (1).

981415951 is an equidigital number, since it uses as much as digits as its factorization.

981415951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 43.

The square root of 981415951 is about 31327.5589696995. The cubic root of 981415951 is about 993.7665417338.

The spelling of 981415951 in words is "nine hundred eighty-one million, four hundred fifteen thousand, nine hundred fifty-one".