978742619 has 2 divisors, whose sum is σ = 978742620. Its totient is φ = 978742618.

The previous prime is 978742601. The next prime is 978742631. The reversal of 978742619 is 916247879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 978742619 - 2¹⁶ = 978677083 is a prime.

It is a super-2 number, since 2×978742619² = 1915874228493958322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (978744619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489371309 + 489371310.

It is an arithmetic number, because the mean of its divisors is an integer number (489371310).

Almost surely, 2^978742619 is an apocalyptic number.

978742619 is a deficient number, since it is larger than the sum of its proper divisors (1).

978742619 is an equidigital number, since it uses as much as digits as its factorization.

978742619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 53.

The square root of 978742619 is about 31284.8624577446. The cubic root of 978742619 is about 992.8633963805.

The spelling of 978742619 in words is "nine hundred seventy-eight million, seven hundred forty-two thousand, six hundred nineteen".