87153949 has 2 divisors, whose sum is σ = 87153950. Its totient is φ = 87153948.

The previous prime is 87153943. The next prime is 87153953. The reversal of 87153949 is 94935178.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68724100 + 18429849 = 8290^2 + 4293^2 .

It is a cyclic number.

It is not a de Polignac number, because 87153949 - 2¹¹ = 87151901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87153899 and 87153908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87153943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43576974 + 43576975.

It is an arithmetic number, because the mean of its divisors is an integer number (43576975).

Almost surely, 2^87153949 is an apocalyptic number.

It is an amenable number.

87153949 is a deficient number, since it is larger than the sum of its proper divisors (1).

87153949 is an equidigital number, since it uses as much as digits as its factorization.

87153949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 87153949 is about 9335.6279381732. The cubic root of 87153949 is about 443.3659703613.

The spelling of 87153949 in words is "eighty-seven million, one hundred fifty-three thousand, nine hundred forty-nine".