1921701461 has 2 divisors, whose sum is σ = 1921701462. Its totient is φ = 1921701460.

The previous prime is 1921701427. The next prime is 1921701469. The reversal of 1921701461 is 1641071291.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1577598961 + 344102500 = 39719^2 + 18550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1921701461 - 2²² = 1917507157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1921701469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960850730 + 960850731.

It is an arithmetic number, because the mean of its divisors is an integer number (960850731).

Almost surely, 2^1921701461 is an apocalyptic number.

It is an amenable number.

1921701461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921701461 is an equidigital number, since it uses as much as digits as its factorization.

1921701461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1921701461 is about 43837.2154795443. The cubic root of 1921701461 is about 1243.2600352985.

The spelling of 1921701461 in words is "one billion, nine hundred twenty-one million, seven hundred one thousand, four hundred sixty-one".