378929497 has 4 divisors (see below), whose sum is σ = 378973440. Its totient is φ = 378885556.

The previous prime is 378929491. The next prime is 378929549. The reversal of 378929497 is 794929873.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 378929497 - 2¹¹ = 378927449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378929491) 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, 4297 + ... + 27862.

It is an arithmetic number, because the mean of its divisors is an integer number (94743360).

Almost surely, 2^378929497 is an apocalyptic number.

It is an amenable number.

378929497 is a deficient number, since it is larger than the sum of its proper divisors (43943).

378929497 is a wasteful number, since it uses less digits than its factorization.

378929497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43942.

The product of its digits is 6858432, while the sum is 58.

The square root of 378929497 is about 19466.1115017869. Note that the first 3 decimals coincide. The cubic root of 378929497 is about 723.6348449364.

The spelling of 378929497 in words is "three hundred seventy-eight million, nine hundred twenty-nine thousand, four hundred ninety-seven".