1397617930 has 8 divisors (see below), whose sum is σ = 2515712292. Its totient is φ = 559047168.

The previous prime is 1397617927. The next prime is 1397617933. The reversal of 1397617930 is 397167931.

It is an interprime number because it is at equal distance from previous prime (1397617927) and next prime (1397617933).

It can be written as a sum of positive squares in 2 ways, for example, as 1296072001 + 101545929 = 36001^2 + 10077^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1397617933) 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, 69880887 + ... + 69880906.

Almost surely, 2^1397617930 is an apocalyptic number.

1397617930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1397617930 is a deficient number, since it is larger than the sum of its proper divisors (1118094362).

1397617930 is a wasteful number, since it uses less digits than its factorization.

1397617930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139761800.

The product of its (nonzero) digits is 214326, while the sum is 46.

The square root of 1397617930 is about 37384.7285666220. The cubic root of 1397617930 is about 1118.0541068046.

The spelling of 1397617930 in words is "one billion, three hundred ninety-seven million, six hundred seventeen thousand, nine hundred thirty".