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73131493 is a prime number
BaseRepresentation
bin1000101101111…
…10010111100101
312002121110112211
410112332113211
5122210201433
611131243421
71545415231
oct426762745
9162543484
1073131493
113830a856
12205a9571
13121c6c96
1499d95c1
1566488cd
hex45be5e5

73131493 has 2 divisors, whose sum is σ = 73131494. Its totient is φ = 73131492.

The previous prime is 73131481. The next prime is 73131517. The reversal of 73131493 is 39413137.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68260644 + 4870849 = 8262^2 + 2207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-73131493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73131403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36565746 + 36565747.

It is an arithmetic number, because the mean of its divisors is an integer number (36565747).

Almost surely, 273131493 is an apocalyptic number.

It is an amenable number.

73131493 is a deficient number, since it is larger than the sum of its proper divisors (1).

73131493 is an equidigital number, since it uses as much as digits as its factorization.

73131493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 31.

The square root of 73131493 is about 8551.6953289976. The cubic root of 73131493 is about 418.1847069500.

The spelling of 73131493 in words is "seventy-three million, one hundred thirty-one thousand, four hundred ninety-three".