516154949 has 2 divisors, whose sum is σ = 516154950. Its totient is φ = 516154948.

The previous prime is 516154943. The next prime is 516154967. The reversal of 516154949 is 949451615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 293608225 + 222546724 = 17135^2 + 14918^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516154949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516154943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258077474 + 258077475.

It is an arithmetic number, because the mean of its divisors is an integer number (258077475).

Almost surely, 2^516154949 is an apocalyptic number.

It is an amenable number.

516154949 is a deficient number, since it is larger than the sum of its proper divisors (1).

516154949 is an equidigital number, since it uses as much as digits as its factorization.

516154949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 44.

The square root of 516154949 is about 22719.0437518836. The cubic root of 516154949 is about 802.1582083725.

The spelling of 516154949 in words is "five hundred sixteen million, one hundred fifty-four thousand, nine hundred forty-nine".