153721397 has 8 divisors (see below), whose sum is σ = 160681344. Its totient is φ = 146784528.

The previous prime is 153721387. The next prime is 153721411. The reversal of 153721397 is 793127351.

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

It is not a de Polignac number, because 153721397 - 2⁶ = 153721333 is a prime.

It is a super-3 number, since 3×153721397³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 153721397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153721357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8648 + ... + 19550.

It is an arithmetic number, because the mean of its divisors is an integer number (20085168).

Almost surely, 2^153721397 is an apocalyptic number.

It is an amenable number.

153721397 is a deficient number, since it is larger than the sum of its proper divisors (6959947).

153721397 is a wasteful number, since it uses less digits than its factorization.

153721397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11539.

The product of its digits is 39690, while the sum is 38.

The square root of 153721397 is about 12398.4433297088. The cubic root of 153721397 is about 535.6874117177.

The spelling of 153721397 in words is "one hundred fifty-three million, seven hundred twenty-one thousand, three hundred ninety-seven".