1930379797 has 2 divisors, whose sum is σ = 1930379798. Its totient is φ = 1930379796.

The previous prime is 1930379783. The next prime is 1930379819. The reversal of 1930379797 is 7979730391.

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., 966339396 + 964040401 = 31086^2 + 31049^2 .

It is a cyclic number.

It is not a de Polignac number, because 1930379797 - 2⁷ = 1930379669 is a prime.

It is a super-2 number, since 2×1930379797² = 7452732321331522418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1930379707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 965189898 + 965189899.

It is an arithmetic number, because the mean of its divisors is an integer number (965189899).

Almost surely, 2^1930379797 is an apocalyptic number.

It is an amenable number.

1930379797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1930379797 is an equidigital number, since it uses as much as digits as its factorization.

1930379797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250423, while the sum is 55.

The square root of 1930379797 is about 43936.0876387509. The cubic root of 1930379797 is about 1245.1287312790.

The spelling of 1930379797 in words is "one billion, nine hundred thirty million, three hundred seventy-nine thousand, seven hundred ninety-seven".