399977153 has 4 divisors (see below), whose sum is σ = 417367488. Its totient is φ = 382586820.

The previous prime is 399977129. The next prime is 399977161. The reversal of 399977153 is 351779993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 351779993 = 6619 ⋅53147.

It is a cyclic number.

It is not a de Polignac number, because 399977153 - 2⁶ = 399977089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 399977095 and 399977104.

It is not an unprimeable number, because it can be changed into a prime (399977653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8695133 + ... + 8695178.

It is an arithmetic number, because the mean of its divisors is an integer number (104341872).

Almost surely, 2^399977153 is an apocalyptic number.

It is an amenable number.

399977153 is a deficient number, since it is larger than the sum of its proper divisors (17390335).

399977153 is a wasteful number, since it uses less digits than its factorization.

399977153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17390334.

The product of its digits is 1607445, while the sum is 53.

The square root of 399977153 is about 19999.4288168437. The cubic root of 399977153 is about 736.7922712830.

The spelling of 399977153 in words is "three hundred ninety-nine million, nine hundred seventy-seven thousand, one hundred fifty-three".