87314729120621 has 8 divisors (see below), whose sum is σ = 89842990477464. Its totient is φ = 84819090491200.

The previous prime is 87314729120609. The next prime is 87314729120657. The reversal of 87314729120621 is 12602192741378.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37623367496521 + 49691361624100 = 6133789^2 + 7049210^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87314729120621 - 2³⁸ = 87039851213677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87314729120681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8155676426 + ... + 8155687131.

It is an arithmetic number, because the mean of its divisors is an integer number (11230373809683).

Almost surely, 2^{87314729120621} is an apocalyptic number.

It is an amenable number.

87314729120621 is a deficient number, since it is larger than the sum of its proper divisors (2528261356843).

87314729120621 is a wasteful number, since it uses less digits than its factorization.

87314729120621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16311363711.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 87314729120621 in words is "eighty-seven trillion, three hundred fourteen billion, seven hundred twenty-nine million, one hundred twenty thousand, six hundred twenty-one".