87949397 has 2 divisors, whose sum is σ = 87949398. Its totient is φ = 87949396.

The previous prime is 87949391. The next prime is 87949403. The reversal of 87949397 is 79394978.

It is a balanced prime because it is at equal distance from previous prime (87949391) and next prime (87949403).

It can be written as a sum of positive squares in only one way, i.e., 49434961 + 38514436 = 7031^2 + 6206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87949397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87949391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43974698 + 43974699.

It is an arithmetic number, because the mean of its divisors is an integer number (43974699).

Almost surely, 2^87949397 is an apocalyptic number.

It is an amenable number.

87949397 is a deficient number, since it is larger than the sum of its proper divisors (1).

87949397 is an equidigital number, since it uses as much as digits as its factorization.

87949397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 56.

The square root of 87949397 is about 9378.1339828348. The cubic root of 87949397 is about 444.7107441420.

The spelling of 87949397 in words is "eighty-seven million, nine hundred forty-nine thousand, three hundred ninety-seven".