87672421413 has 10 divisors (see below), whose sum is σ = 130967444454. Its totient is φ = 58448280888.

The previous prime is 87672421409. The next prime is 87672421423. The reversal of 87672421413 is 31412427678.

It can be written as a sum of positive squares in only one way, i.e., 59896199169 + 27776222244 = 244737^2 + 166662^2 .

It is not a de Polignac number, because 87672421413 - 2² = 87672421409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87672421423) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 541187706 + ... + 541187867.

Almost surely, 2^87672421413 is an apocalyptic number.

It is an amenable number.

87672421413 is a deficient number, since it is larger than the sum of its proper divisors (43295023041).

87672421413 is a wasteful number, since it uses less digits than its factorization.

87672421413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082375585 (or 1082375576 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The spelling of 87672421413 in words is "eighty-seven billion, six hundred seventy-two million, four hundred twenty-one thousand, four hundred thirteen".