870897701961 has 45 divisors (see below), whose sum is σ = 1513476183351. Its totient is φ = 497622233808.

The previous prime is 870897701959. The next prime is 870897701969. The reversal of 870897701961 is 169107798078.

The square root of 870897701961 is 933219.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 259442516025 + 611455185936 = 509355^2 + 781956^2 .

It is not a de Polignac number, because 870897701961 - 2¹ = 870897701959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (870897701969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 58785391 + ... + 58800203.

Almost surely, 2^870897701961 is an apocalyptic number.

870897701961 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

870897701961 is the 933219-th square number.

870897701961 is the 466610-th centered octagonal number.

It is an amenable number.

870897701961 is a deficient number, since it is larger than the sum of its proper divisors (642578481390).

870897701961 is an frugal number, since it uses more digits than its factorization.

870897701961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29652 (or 14823 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 63.

The spelling of 870897701961 in words is "eight hundred seventy billion, eight hundred ninety-seven million, seven hundred one thousand, nine hundred sixty-one".