953978261 has 2 divisors, whose sum is σ = 953978262. Its totient is φ = 953978260.

The previous prime is 953978251. The next prime is 953978269. The reversal of 953978261 is 162879359.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 812820100 + 141158161 = 28510^2 + 11881^2 .

It is a cyclic number.

It is not a de Polignac number, because 953978261 - 2⁶ = 953978197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (953978269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 476989130 + 476989131.

It is an arithmetic number, because the mean of its divisors is an integer number (476989131).

Almost surely, 2^953978261 is an apocalyptic number.

It is an amenable number.

953978261 is a deficient number, since it is larger than the sum of its proper divisors (1).

953978261 is an equidigital number, since it uses as much as digits as its factorization.

953978261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 50.

The square root of 953978261 is about 30886.5385079002. The cubic root of 953978261 is about 984.4178789633.

The spelling of 953978261 in words is "nine hundred fifty-three million, nine hundred seventy-eight thousand, two hundred sixty-one".