1623661037 has 4 divisors (see below), whose sum is σ = 1661420640. Its totient is φ = 1585901436.

The previous prime is 1623661027. The next prime is 1623661051. The reversal of 1623661037 is 7301663261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1623661037 - 2⁴ = 1623661021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1623660988 and 1623661006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623661027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18879737 + ... + 18879822.

It is an arithmetic number, because the mean of its divisors is an integer number (415355160).

Almost surely, 2^1623661037 is an apocalyptic number.

It is an amenable number.

1623661037 is a deficient number, since it is larger than the sum of its proper divisors (37759603).

1623661037 is an equidigital number, since it uses as much as digits as its factorization.

1623661037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37759602.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 1623661037 is about 40294.6775269390. The cubic root of 1623661037 is about 1175.3443474228.

The spelling of 1623661037 in words is "one billion, six hundred twenty-three million, six hundred sixty-one thousand, thirty-seven".