1972402379 has 2 divisors, whose sum is σ = 1972402380. Its totient is φ = 1972402378.

The previous prime is 1972402351. The next prime is 1972402447. The reversal of 1972402379 is 9732042791.

It is a weak prime.

It is an emirp because it is prime and its reverse (9732042791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1972402379 - 2¹² = 1972398283 is a prime.

It is a super-2 number, since 2×1972402379² = 7780742289369719282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1972402349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986201189 + 986201190.

It is an arithmetic number, because the mean of its divisors is an integer number (986201190).

Almost surely, 2^1972402379 is an apocalyptic number.

1972402379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972402379 is an equidigital number, since it uses as much as digits as its factorization.

1972402379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 1972402379 is about 44411.7369509457. The cubic root of 1972402379 is about 1254.0990510514.

The spelling of 1972402379 in words is "one billion, nine hundred seventy-two million, four hundred two thousand, three hundred seventy-nine".