397970249 has 4 divisors (see below), whose sum is σ = 398120400. Its totient is φ = 397820100.

The previous prime is 397970239. The next prime is 397970297. The reversal of 397970249 is 942079793.

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.

It is a cyclic number.

It is not a de Polignac number, because 397970249 - 2⁴ = 397970233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397970197 and 397970206.

It is not an unprimeable number, because it can be changed into a prime (397970239) 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, 71027 + ... + 76424.

It is an arithmetic number, because the mean of its divisors is an integer number (99530100).

Almost surely, 2^397970249 is an apocalyptic number.

It is an amenable number.

397970249 is a deficient number, since it is larger than the sum of its proper divisors (150151).

397970249 is a wasteful number, since it uses less digits than its factorization.

397970249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150150.

The product of its (nonzero) digits is 857304, while the sum is 50.

The square root of 397970249 is about 19949.1916878855. The cubic root of 397970249 is about 735.5579079675.

It can be divided in two parts, 39 and 7970249, that multiplied together give a triangular number (310839711 = T₂₄₉₃₃).

The spelling of 397970249 in words is "three hundred ninety-seven million, nine hundred seventy thousand, two hundred forty-nine".