55690619 has 2 divisors, whose sum is σ = 55690620. Its totient is φ = 55690618.

The previous prime is 55690597. The next prime is 55690673. The reversal of 55690619 is 91609655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55690619 - 2¹² = 55686523 is a prime.

It is a super-2 number, since 2×55690619² = 6202890089206322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55690699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27845309 + 27845310.

It is an arithmetic number, because the mean of its divisors is an integer number (27845310).

Almost surely, 2^55690619 is an apocalyptic number.

55690619 is a deficient number, since it is larger than the sum of its proper divisors (1).

55690619 is an equidigital number, since it uses as much as digits as its factorization.

55690619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 55690619 is about 7462.6147562366. The cubic root of 55690619 is about 381.8803820350.

The spelling of 55690619 in words is "fifty-five million, six hundred ninety thousand, six hundred nineteen".