398877632197 has 12 divisors (see below), whose sum is σ = 445623223948. Its totient is φ = 356671497600.

The previous prime is 398877632143. The next prime is 398877632243. The reversal of 398877632197 is 791236778893.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 118534915521 + 280342716676 = 344289^2 + 529474^2 .

It is not a de Polignac number, because 398877632197 - 2²³ = 398869243589 is a prime.

It is a super-2 number, since 2×398877632197² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398877632597) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27013188 + ... + 27027949.

Almost surely, 2^398877632197 is an apocalyptic number.

It is an amenable number.

398877632197 is a deficient number, since it is larger than the sum of its proper divisors (46745591751).

398877632197 is a wasteful number, since it uses less digits than its factorization.

398877632197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54041220 (or 54041209 counting only the distinct ones).

The product of its digits is 192036096, while the sum is 70.

The spelling of 398877632197 in words is "three hundred ninety-eight billion, eight hundred seventy-seven million, six hundred thirty-two thousand, one hundred ninety-seven".