1625457347 has 8 divisors (see below), whose sum is σ = 1651903776. Its totient is φ = 1599124032.

The previous prime is 1625457307. The next prime is 1625457349. The reversal of 1625457347 is 7437545261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1625457347 - 2²⁰ = 1624408771 is a prime.

It is a super-2 number, since 2×1625457347² = 5284223173832556818, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1625457298 and 1625457307.

It is not an unprimeable number, because it can be changed into a prime (1625457349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 938 + ... + 57024.

It is an arithmetic number, because the mean of its divisors is an integer number (206487972).

Almost surely, 2^1625457347 is an apocalyptic number.

1625457347 is a deficient number, since it is larger than the sum of its proper divisors (26446429).

1625457347 is an equidigital number, since it uses as much as digits as its factorization.

1625457347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56557.

The product of its digits is 705600, while the sum is 44.

The square root of 1625457347 is about 40316.9610337882. The cubic root of 1625457347 is about 1175.7776284753. Note that the first 3 decimals are identical.

The spelling of 1625457347 in words is "one billion, six hundred twenty-five million, four hundred fifty-seven thousand, three hundred forty-seven".