1390616551 has 4 divisors (see below), whose sum is σ = 1395003672. Its totient is φ = 1386229432.

The previous prime is 1390616537. The next prime is 1390616587. The reversal of 1390616551 is 1556160931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1390616551 - 2⁵ = 1390616519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1390616551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390616651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2193085 + ... + 2193718.

It is an arithmetic number, because the mean of its divisors is an integer number (348750918).

Almost surely, 2^1390616551 is an apocalyptic number.

1390616551 is a deficient number, since it is larger than the sum of its proper divisors (4387121).

1390616551 is an equidigital number, since it uses as much as digits as its factorization.

1390616551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4387120.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 1390616551 is about 37290.9714408193. The cubic root of 1390616551 is about 1116.1840133593.

The spelling of 1390616551 in words is "one billion, three hundred ninety million, six hundred sixteen thousand, five hundred fifty-one".