999461257 has 2 divisors, whose sum is σ = 999461258. Its totient is φ = 999461256.

The previous prime is 999461233. The next prime is 999461261. The reversal of 999461257 is 752164999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 802928896 + 196532361 = 28336^2 + 14019^2 .

It is an emirp because it is prime and its reverse (752164999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999461257 - 2⁷ = 999461129 is a prime.

It is not a weakly prime, because it can be changed into another prime (999468257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499730628 + 499730629.

It is an arithmetic number, because the mean of its divisors is an integer number (499730629).

Almost surely, 2^999461257 is an apocalyptic number.

It is an amenable number.

999461257 is a deficient number, since it is larger than the sum of its proper divisors (1).

999461257 is an equidigital number, since it uses as much as digits as its factorization.

999461257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 52.

The square root of 999461257 is about 31614.2571793171. The cubic root of 999461257 is about 999.8203867410.

The spelling of 999461257 in words is "nine hundred ninety-nine million, four hundred sixty-one thousand, two hundred fifty-seven".