1931398601 has 8 divisors (see below), whose sum is σ = 2123572224. Its totient is φ = 1741990320.

The previous prime is 1931398597. The next prime is 1931398613. The reversal of 1931398601 is 1068931391.

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

It is a cyclic number.

It is not a de Polignac number, because 1931398601 - 2² = 1931398597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1931398681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689870 + ... + 692663.

It is an arithmetic number, because the mean of its divisors is an integer number (265446528).

Almost surely, 2^1931398601 is an apocalyptic number.

1931398601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1931398601 is a deficient number, since it is larger than the sum of its proper divisors (192173623).

1931398601 is a wasteful number, since it uses less digits than its factorization.

1931398601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382671.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 1931398601 is about 43947.6802687013. The cubic root of 1931398601 is about 1245.3477415539.

The spelling of 1931398601 in words is "one billion, nine hundred thirty-one million, three hundred ninety-eight thousand, six hundred one".