390797429 has 4 divisors (see below), whose sum is σ = 426324480. Its totient is φ = 355270380.

The previous prime is 390797423. The next prime is 390797471. The reversal of 390797429 is 924797093.

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 390797429 - 2⁴ = 390797413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390797423) 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, 17763509 + ... + 17763530.

It is an arithmetic number, because the mean of its divisors is an integer number (106581120).

Almost surely, 2^390797429 is an apocalyptic number.

It is an amenable number.

390797429 is a deficient number, since it is larger than the sum of its proper divisors (35527051).

390797429 is a wasteful number, since it uses less digits than its factorization.

390797429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35527050.

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

The square root of 390797429 is about 19768.5970417731. The cubic root of 390797429 is about 731.1119782945. Note that the first 3 decimals are identical.

The spelling of 390797429 in words is "three hundred ninety million, seven hundred ninety-seven thousand, four hundred twenty-nine".