1967672621 has 2 divisors, whose sum is σ = 1967672622. Its totient is φ = 1967672620.

The previous prime is 1967672569. The next prime is 1967672659. The reversal of 1967672621 is 1262767691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1343222500 + 624450121 = 36650^2 + 24989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1967672621 - 2²² = 1963478317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1967672521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983836310 + 983836311.

It is an arithmetic number, because the mean of its divisors is an integer number (983836311).

Almost surely, 2^1967672621 is an apocalyptic number.

It is an amenable number.

1967672621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1967672621 is an equidigital number, since it uses as much as digits as its factorization.

1967672621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 47.

The square root of 1967672621 is about 44358.4560258808. The cubic root of 1967672621 is about 1253.0958188747.

The spelling of 1967672621 in words is "one billion, nine hundred sixty-seven million, six hundred seventy-two thousand, six hundred twenty-one".