399870153 has 6 divisors (see below), whose sum is σ = 577590234. Its totient is φ = 266580096.

The previous prime is 399870131. The next prime is 399870167. The reversal of 399870153 is 351078993.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 369100944 + 30769209 = 19212^2 + 5547^2 .

It is not a de Polignac number, because 399870153 - 2¹⁶ = 399804617 is a prime.

It is a super-2 number, since 2×399870153² = 319792278520486818, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 399870099 and 399870108.

It is not an unprimeable number, because it can be changed into a prime (399800153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22215000 + ... + 22215017.

It is an arithmetic number, because the mean of its divisors is an integer number (96265039).

Almost surely, 2^399870153 is an apocalyptic number.

It is an amenable number.

399870153 is a deficient number, since it is larger than the sum of its proper divisors (177720081).

399870153 is a wasteful number, since it uses less digits than its factorization.

399870153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44430023 (or 44430020 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 399870153 is about 19996.7535615159. The cubic root of 399870153 is about 736.7265643600.

The spelling of 399870153 in words is "three hundred ninety-nine million, eight hundred seventy thousand, one hundred fifty-three".