1397403929 has 2 divisors, whose sum is σ = 1397403930. Its totient is φ = 1397403928.

The previous prime is 1397403923. The next prime is 1397403977. The reversal of 1397403929 is 9293047931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1312395529 + 85008400 = 36227^2 + 9220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397403929 - 2¹² = 1397399833 is a prime.

It is not a weakly prime, because it can be changed into another prime (1397403923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698701964 + 698701965.

It is an arithmetic number, because the mean of its divisors is an integer number (698701965).

Almost surely, 2^1397403929 is an apocalyptic number.

It is an amenable number.

1397403929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397403929 is an equidigital number, since it uses as much as digits as its factorization.

1397403929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 1397403929 is about 37381.8663124248. The cubic root of 1397403929 is about 1117.9970390121.

The spelling of 1397403929 in words is "one billion, three hundred ninety-seven million, four hundred three thousand, nine hundred twenty-nine".